Composition of Japanese Forces in Northeast Asia, August 1941

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BobTheBarbarian
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Composition of Japanese Forces in Northeast Asia, August 1941

#1

Post by BobTheBarbarian » 11 Feb 2022, 19:40

Hello,

I have some questions regarding Japanese forces in Northeast Asia at the time of the "Kwantung Army Special Maneuvers" (Kantokuen), specifically around 1 September 1941 before transfers to the Southern Theater began:

1) What was the composition of the Japanese Korea Army at the end of August/1 September 1941? (Many thanks to fontessa for providing the Kwantung Army composition here: viewtopic.php?f=65&t=216394&)

2) What air forces were based in Manchuria and Korea at that time?

3) What was the composition of Japanese land and air forces in Karafuto?

4) What was the composition of Japanese land and air forces in the Kuril Islands?

5) In volume 20 of "Senshi Sosho," this "hypothetical" order of battle for the Kwantung Army is presented:

Image

After 31 July 1941, it was decided that the 16 divisions in Manchuria and Korea would be reinforced to 24 if Japan went to war with the Soviet Union. Is there any information on what smaller units would have been sent to Manchuria and Korea as well? For example, artillery, tanks, air units, engineers, and so on? What about the Kuriles and Karafuto?

6) In "Japanese Studies on Manchuria, volume 1," it's mentioned that an operation involving two reinforced divisions was planned against Soviet Sakhalin: one would cross the border from Karafuto and the other would make an amphibious landing on the northern side of the island. Which divisions and what other units were assigned to this operation?

Thanks.
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fontessa
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Re: Composition of Japanese Forces in Northeast Asia, August 1941

#2

Post by fontessa » 12 Feb 2022, 08:09

BobTheBarbarian wrote:
11 Feb 2022, 19:40
2) What air forces were based in Manchuria and Korea at that time?
Below is the composition of the Army Air Force at the time of "Kwantung Army Special Maneuvers". Most of them were stationed in Manchuria and the rest was dispatched to French Indochina.

航空兵団 Air Corp
- 司令部 HQ: 安藤三郎中将 LtG Ando Saburo (18)
- 第2飛行集団 2nd Air Group: See the below
- 第5飛行集団 5th Air Group: See the below
- 第12飛行団 12th Air Brigade
---- 司令部 HQ: 青木武三大佐 Col Aoki Takezo (27)
---- 飛行第1戦隊 (戦闘3中) 1st Air Regiment (F 3C): 武田金四郎中佐 LtC Takeda Kishiro (36)
---- 飛行第11戦隊 (戦闘3中) 11th Air Regiment (F 3C): 岡部貞少佐 Maj Okabe Sadao (35)
---- 飛行第70戦隊 (戦闘2中) 70th Air Regiment (F 2C): 江山六夫少佐 Mai Eyama Mutsuo (37)
- 第13飛行団 13th Air Brigade
---- 司令部 HQ: 今川一策大佐 Col Imagawa Issaku (28)
---- 飛行第85戦隊 (戦闘2中) 85th Air Regiment (F 2C): 山田五郎少佐 Maj Yamada Goro (38)
---- 飛行第87戦隊 (戦闘2中) 87th Air Regiment (F 2C): 進藤常右四門少佐 Maj Shindo Joemon (38)
- 白城子陸軍飛行学校教導飛行団 Hakujoshi Army Air School Air Instruction Brigae
---- 司令部 HQ: 原田宇一郎少将 MjG Harada Uichiro (25)
---- 教導飛行第208戦隊 (軽爆2中) 208th Air Instruction Regiment (LB 2C): 古屋健三大佐 Col Furuya Kenzo (30)
---- 第206独立飛行隊 (軍偵 1中 and 直協 1中) 206th Independent Air Unit (AR 1C and DC 1C): 安在秋男中佐 LtC Anzai Akio (31)
- 第15独立飛行隊 (軍偵 1中 and 直協 1中) 15th Independent Air Unit (AR 1C and DC 1C): 中浜吾祐中佐 LtC Nakahama Goyu (31)
- 飛行第7戦隊 (重爆3中) 7th Air Regiment (HB 3C): 深井英一中佐 LtC Fukai Eiichi (34)
- 第6直協飛行隊 6th Direct Cooperation Air Unit
- 第7直協飛行隊 7th Direct Cooperation Air Unit

第2飛行集団 2nd Air Group
- 司令部 HQ: 寺本熊市中将 LtG Teramoto Kumaichi (22)
- 第2飛行団 2nd Air Brigade
---- 司令部 HQ: 中野美明少将 MjG Nakano Bimei (26)
---- 飛行第6戦隊 (軽爆3中) 6th Air Regiment (LB 3C): 平田勝治大佐 Col Hirata Katsuji (28)
---- 飛行第9戦隊 (軽爆3中) 9th Air Regiment (F 3C): 秋田熊雄少佐 MjC Akita Kumao (33)
---- 第29独立飛行隊 (軍偵 1中 and 直協 1中) 29th Independent Air Unit (AR 1C and DC 1C): 光岡明中佐 LtC Mitsuoka Akira (32)
- 第7飛行団 2nd Air Brigade
---- 司令部 HQ: 山本健児少佐 MjG Yamamoto Kenji (28) / Under dispatched to French Indochina
---- 飛行第12戦隊 (重爆3中) 12th Air Regiment (HB 3C): 北島熊男大佐 Col Kitajima Kumao (29)
---- 飛行第27戦隊 (軽爆3中) 27th Air Regiment (LB 3C): 桜井肇中佐 LtC Sakurai Hajime (30) / Under dispatched to French Indochina
---- 飛行第64戦隊 (戦闘3中) 64th Air Regiment (F 3C): 加藤建夫中佐 LtG Kato Takeo (37) / Under dispatched to French Indochina
---- 飛行第98戦隊 (重爆3中) 98th Air Regiment (HB 3C): 白井茂樹大佐 Col Shirai Shigeki (31)
- 第8飛行団 8th Air Brigade
---- 司令部 HQ: 田副登少将 MjG Tazoe Noboru (26)
---- 飛行第16戦隊 (軽爆3中) 16th Air Regiment (LB 3C): 久米精一中佐 LtC Kume Seiichi (31)
---- 飛行第32戦隊 (軽爆3中) 32nd Air Regiment (LB 3C): 相京正夫中佐 LtC Aikoyo Masao (32)
---- 飛行第33戦隊 (戦闘3中) 33rd Air Regiment (F 3C): 原田潔中佐 LtC Harada Kiyoshi (33)
---- 飛行第58戦隊 (重爆3中) 58th Air Regiment (HB 3C): 瀧昇大佐 Col Taki Noboru (27)
- 第28独立飛行隊 (司偵 2中) 28th Independent Air Unit (HR 2C): 松沢恭平大佐 Col Matsuzawa Kyoshei (33)
- 第83独立飛行隊 (軍偵 2中) 83rd Independent Air Unit (AR 2C): 二田原謙治郎大佐 Col Nitahara Kenjiro (30)

第5飛行集団 5th Air Group
- 司令部 HQ: 小畑英良中将 LtG Obata Eiryo (23)
- 第9飛行団 9th Air Brigade
---- 司令部 HQ: 橋本秀信少将 MjG Hashimoto Hidenobu (27)
---- 飛行第24戦隊 (戦闘3中) 24th Air Regiment (F 3C): 高橋武少佐 Maj Takahashi Takeshi (38)
---- 飛行第45戦隊 (軽爆3中) 45th Air Regiment (LB 3C): 土生秀治大佐 Col Habu Hideji (31)
---- 飛行第61戦隊 (重爆3中) 61st Air Regiment (HB 3C): 篠崎茂大佐 Col Shinozaki Shigeru (25)
- 第10飛行団 10th Air Brigade
---- 司令部 HQ: 広田豊少将 MjG Hirota Yutaka (27)
---- 飛行第31戦隊 (軽爆3中) 31st Air Regiment (LB 3C): 長谷川正雄中佐 LtC Hasegawa Masao
---- 飛行第77戦隊 (戦闘3中) 77th Air Regiment (F 3C): 吉川洋少佐 Maj Yoshikawa Hiroshi (37)


Notes;
(3中) (3C) means (3中隊) (3 Companies)
F means Fighter: Only 59th and 64th Air Regiments were equipped with Oscar, rest were with Nate.
LB means Light Bomber
HB means Heavy Bomber
DC means Direct Cooperation
HR means Headquarters Reconnaissance: Reconnaissance with the order of Area Army HQ
AR means Army Reconnaissance: Reconnaissance with the order of Army HQ


fontessa


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Re: Composition of Japanese Forces in Northeast Asia, August 1941

#3

Post by BobTheBarbarian » 12 Feb 2022, 08:38

Hello,

Well done! What do the numbers in parenthesis mean, does this indicate the number of planes?
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Re: Composition of Japanese Forces in Northeast Asia, August 1941

#4

Post by fontessa » 12 Feb 2022, 08:58

BobTheBarbarian wrote:
12 Feb 2022, 08:38
What do the numbers in parenthesis mean, does this indicate the number of planes?
The numbers in parenthesis mean that of companies.
The number of planes was as follows;
12 planes for one fighter company.
9 planes for one light/heavy bomber companies.
9 planes for one reconnaissance company.

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Re: Composition of Japanese Forces in Northeast Asia, August 1941

#5

Post by fontessa » 10 Mar 2022, 04:09

Hello Bob,
BobTheBarbarian wrote:
11 Feb 2022, 19:40
After 31 July 1941, it was decided that the 16 divisions in Manchuria and Korea would be reinforced to 24 if Japan went to war with the Soviet Union. Is there any information on what smaller units would have been sent to Manchuria and Korea as well? For example, artillery, tanks, air units, engineers, and so on? What about the Kuriles and Karafuto?
IJA considered that in order to defend both Manchuria and Korea, 16 Divisions were necessary at least. But Kwantung and Korean Armies had only 14 divisions because some divisions were needed in China as well. The addition of the 2 divisions required for the minimum defense of Manchuria was approved on June 18, and the mobilizations of the 51st Division in Utsunomiya and the 57th Division in Hirosaki were decided. Following this 1st Transportation, the following 2nd Transportation was decided.
1st Transportation
51st Division and 57th Division: Depart Japan on July 20 / Arrived Manchuria on August 24
2nd Transportation
(1) 36th Division and 41st Division - Transferred from China: Departed North China on July 24 / Arrived Manchuria on August 29
(2) 2nd (in Sendai), 52nd (in Kanazawa), 53rd (Kyoto), and 54th (Himeji) Divisions - Newly Mobilized: Depart Japan on August 1 / Arrived Manchuria on September 5

These mobilizations were carried out with 特臨第1号 Special Organization Order No.1 dated on July 11. Here, the term “Organization 編成” was used to conceal the intention of “Mobilization 動員”. IJA had decided that the conditions for the start of the war against the Soviet Union would be "the force of the Far Eastern Soviet Union would drop to less than 1/2 and both Air Force and Tank units would drop to less than 1/3".
After all, the war against the Soviet Union did not happen at last. Officially the war against the Soviet Union was abandoned and the advance to the south was determined in 御前会議 Imperial Conference under the presence of the Emperor which was held on July 2. As a result, the 2nd Transportation was canceled. But 16 divisions system needed for Manchuria and Korea defense was realized. And, in order to protect the back with the advance to the south, the mobilizations with Special Organization Order No.1 were continued and completed.
The compositions of Kwantung Army on 1 August is shown below;
viewtopic.php?f=65&t=216394&p=1954773&#p1954773

I would like to correct a part of the above;
fontessa wrote:
06 Jul 2015, 21:05
◇ Kwantung Army
- 10th Division
- 14th Division
- 28th Division
- 51st Division
◇ Kwantung Army
- 10th Division
- 14th Division
- 28th Division
- 29th Division (addition for the correction)
- 51st Division

I also have the complete compositions of the Kwantung Army on 8 December 1941.
According to it, the compositions of the Kwantung Army on 8 December 1941 were almost the same as those on August 1st.
Kwantung Army direct
- 10th, 14th, 28th, 29th, and 51st Divisions (on August 1st)
- 10th, 28th, and 29th Divisions (on December 8th)
3rd Army
- 8th, 9th, 12th, and 57th Divisions (on August 1st)
- 9th, 12th, and 57th Divisions (on December 8th)
4th Army
- 1st Division (on August 1st)
- 1st Division (on December 8th)
5th Army
- 11th、24th, and 25th Divisions (on August 1st)
- 11th and 24th Divisions (on December 8th)
6th Army
- 23rd Division (on August 1st)
- 14th, and 23rd Divisions (on December 8th)
20th Army
Activated in September with 8th and 25th Divisions
8th and 25th Divisions (on December 8th)
(51st Division was transferred to 23rd Army in September)
Korean Army
- 19th and 20th Divisions (on August 1st)
- 19th and 20th Divisions (on December 8th)
BobTheBarbarian wrote:
11 Feb 2022, 19:40
What about the Kuriles and Karafuto?
Northern Kuril Fortress (Paramushir Island)
Its construction was ordered in August 1939 and the activation of its headquarters and Heavy Fortress Artillery Unit were completed in October 1940. The organization of Infantry Units was ordered on 10 July 1941.
Northern Kuril Fortress Organization
Northern Kuril Fortress HQ
Northern Kuril Fortress Heavy Fortress Artillery Unit
Northern Kuril Fortress Infantry Unit
24th Fortress Engineer Unit
Northern Kuril Army Hospital

Karafuto Mixed Brigade
Karafuto Mixed Brigade was activated on 1 April 1939. It was mobilized (transferred from peacetime organization to wartime organization) with Special Organization Order No.4 dated July 16.
Karafuto Mixed Brigade Organization
Karafuto Mixed Brigade HQ
25th Infantry Regiment (Mobilization: July 28 - August 8)
Karafuto Mixed Brigade Mountain Artillery Unit
Karafuto Mixed Brigade Engineer Unit
Karafuto Mixed Brigade Signal Unit
Karafuto Mixed Brigade Transport Unit
Karafuto Mixed Brigade Medical Unit
25th Infantry Regiment Replace Unit
Karafuto Mixed Brigade Mountain Artillery Unit Replace Unit
Karafuto Mixed Brigade Engineer Unit Replace Unit
BobTheBarbarian wrote:
11 Feb 2022, 19:40
6) In "Japanese Studies on Manchuria, volume 1," it's mentioned that an operation involving two reinforced divisions was planned against Soviet Sakhalin: one would cross the border from Karafuto and the other would make an amphibious landing on the northern side of the island. Which divisions and what other units were assigned to this operation?
In the “Operation policy against Russia” in 昭和15年度帝国陸軍作戦計画 IJA Operations Plan in 1940 (Fiscal Year), the below was mentioned.
"Immediately occupy North Sakhalin, preferably the important area near Kamchatka Depending on the situation, there may be an operation on the opposite bank of Sakhalin. The 7th Division and Kaeafuto Mixed Brigade may be used." There was no description about ”amphibious landing on the northern side.” Unfortunately “Operation policy against Russia” 1941 version is not left. But, perhaps ”amphibious landing on the northern side” was described in the 1941 version. 7th Division emphasized landing operations and conducted its training/exercises in May - June 1941.
BobTheBarbarian wrote:
11 Feb 2022, 19:40
1) What was the composition of the Japanese Korea Army at the end of August/1 September 1941?
Composition of Korea Army on 1 September 1941
朝鮮軍司令部 Korea Army HQ
第19師団 19th Division
- 15th Field Heavy Artillery Regiment
- 35th Field Heavy Artillery Regiment
第20師団 20th Division
- 59th sea Duty Company
第19留守師団 19th Depo Division
- 15th Field Heavy Regiment Replacement Unit
- 35th Field Heavy Regiment Replacement Unit
- 羅津陸軍病院 Rajin Army Hospital
- 会寧陸軍病院 Hoeryong Army Hospital
- 威興陸軍病院 Hamhung Army Hospital
第20留守師団 20th Depo Division
- 京城陸軍病院 Seoul Army Hospital
- 平壌陸軍病院 Pyongyang Army Hospital
- 大邸陸軍病院 Taegu Army Hospital
42nd Air Defense Regiment
41st Independent AAA Company
42nd Independent AAA Company
43rd Independent AAA Company
44th Independent AAA Company
45th Independent AAA Company
41st Air Defense Communications Unit
41st Air Defense Watch Unit
42nd Air Defense Watch Unit
43rd Air Defense Watch Unit
44th Air Defense Watch Unit
45th Air Defense Watch Unit
46th Air Defense Watch Unit
47th Air Defense Watch Unit
羅津要塞司令部 Rajin Fortress HQ
- Rajin Fortress Heavy Artillery Regiment
- 41st Independent AAA Battalion
- Rajin Army Hospital
鎮海湾要塞司令部 Chinhae Bay Fortress HQ
- Chinhae Bay Fortress Heavy Artillery Regiment
- 41st Air Defense Regiment
- Masan Army Hospital
永興湾要塞司令部 Yonghung Bay Fortress HQ
- Yonghung Bay Fortress Heavy Artillery Regiment
- Wonsan Army Hospital
麗水要塞司令部 Yeosu Fortress HQ
- Yeosu Fortress Heavy Artillery Regiment
- Yeosu Fortress Air Defense Unit
- Yeosu Army Hospital
72nd Line-of-communications Sector Unit
300th Independent Motor Transport Company
301st Independent Motor Transport Company
122nd Land Duty Company
5th AAA Regiment Replacement Unit
6th AAA Regiment Replacement Unit
23rd Independent Engineer Regiment Replacement Unit
宣徳陸軍病院 Sondok Army Hospital
BobTheBarbarian wrote:
11 Feb 2022, 19:40
3) What was the composition of Japanese land and air forces in Karafuto?
Land Forces
See Karafuto Mixed Brigade.

Air Forces
The organization of 20th Independent Air Brigade was ordered on 6 January 1943 against the U.S., not to Russia.
20th Independent Air Brigade Composition
Headquarters
3rd Air Regiment (HQ Reconnaissance / Light Bombers)
54th Air Regiment (Fighters)
62nd Air Regiment (Heavy Bombers)
20th Air Distinct Command
20th Air Signal Unit
20th Navigation Air Unit
20th Air Intelligence Unit
BobTheBarbarian wrote:
11 Feb 2022, 19:40
4) What was the composition of Japanese land and air forces in the Kuril Islands?
Land Forces
See Northern Kuril Fortress (Paramushir Island)

Air Forces
No Air Regiment was placed in Kuril Islands.


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Re: Composition of Japanese Forces in Northeast Asia, August 1941

#6

Post by fontessa » 20 Mar 2022, 05:56

Hello Bob,
fontessa wrote:
10 Mar 2022, 04:09
BobTheBarbarian wrote:
11 Feb 2022, 19:40
4) What was the composition of Japanese land and air forces in the Kuril Islands?
Air Forces
No Air Regiment was placed in Kuril Islands.

fontessa
I would like to correct as below,
2nd and 3rd Companies of 54th Air Regiment under the command of the Regiment Commander LCDR Shimada Yasunari Yasunari (38) were dispatched to Paramushir on 20 July 1943. They returned Sapporo leaving the Northern Kuril Islands Dispatch Unit commanded by LT Takeda Osamu (Nautical 52) in August 1944. Northern Kuril Islands Dispatch Unit stayed Paramushir till the Soviet invasion.

fontessa

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Re: Composition of Japanese Forces in Northeast Asia, August 1941

#7

Post by BobTheBarbarian » 26 Mar 2022, 08:20

Hello fontessa,

Impressive as always! I am sorry I was unable to thank you earlier.
fontessa wrote:
10 Mar 2022, 04:09
2nd Transportation
(1) 36th Division and 41st Division - Transferred from China: Departed North China on July 24 / Arrived Manchuria on August 29
(2) 2nd (in Sendai), 52nd (in Kanazawa), 53rd (Kyoto), and 54th (Himeji) Divisions - Newly Mobilized: Depart Japan on August 1 / Arrived Manchuria on September 5
Interesting, this is the first time I have seen the divisions of the 2nd Transportation listed by name.
I would like to correct a part of the above;
...

I also have the complete compositions of the Kwantung Army on 8 December 1941.
Thank you for posting these again. As side note, it's sad what happened to your website, but thankfully most of the pages have been saved by the Internet Archive. For example:

"The Composition of Kwantung Army in August 1941"
https://web.archive.org/web/20160622012 ... 16.08.html

"The Composition of Kwantung Army in December 1941"
https://web.archive.org/web/20160622004 ... 16.12.html

"Brief History of the Army Air Corps Up Until the Pacific War"
https://web.archive.org/web/20160407135 ... .html#3.12

^I was able to find this one thanks to your earlier post.
Northern Kuril Fortress (Paramushir Island)
...
Karafuto Mixed Brigade
...
Composition of Korea Army on 1 September 1941
So the composition of these forces in September was essentially the same as in December. For that month, Leo Niehorster provides the following data concerning the Korea Army (http://niehorster.org/014_japan/41-12-0 ... korea.html). Comparing the two, the biggest differences are:

1) The 35th Field Heavy Artillery Regiment (19th Division) is absent in December 1941.
2) AAA - the December 1941 organization shows the 41st and 47th AAA Battalions as well as the 35th, 41st, 42nd, 43rd, 44th, 45th Independent AAA Companies. Of these, the 47th AAA battalion and 35th Independent AAA company are absent in the September composition.
3) The 23rd Independent Engineer Regiment - I see that for September the 23rd Independent Engineer Replacement Unit is listed but not the regiment itself. Was the 23rd Independent Engineer Regiment not in Korea in August/September 1941?
In the “Operation policy against Russia” in 昭和15年度帝国陸軍作戦計画 IJA Operations Plan in 1940 (Fiscal Year), the below was mentioned.
"Immediately occupy North Sakhalin, preferably the important area near Kamchatka Depending on the situation, there may be an operation on the opposite bank of Sakhalin. The 7th Division and Karafuto Mixed Brigade may be used." There was no description about ”amphibious landing on the northern side.” Unfortunately “Operation policy against Russia” 1941 version is not left. But, perhaps ”amphibious landing on the northern side” was described in the 1941 version. 7th Division emphasized landing operations and conducted its training/exercises in May - June 1941.
The quote from "Japanese Studies on Manchuria vol. 1: 'Japanese Operational Planning Against the USSR'" p. 181 is:
"During the years prior to 1943, the General Staff had always included a plan against North Sakhalin in its annual operational plan. This called for the capture of North Sakhalin by combining ground operations to be launched across the Soviet-Japanese border in Sakhalin with an amphibious operation, both to be conducted by a force having one division as its nucleus. At times, studies had also been made for capturing Petropavlovsk and other key points in the Kamchatka Peninsula by employing elements (with one regiment as a nucleus) of the Sakhalin force in coordination with the operations against North Sakhalin. However, the Kamchatka studies ended in a mere collection of operational data without materializing into a concrete plan."

Possibly this refers to plans created from 1941-1943, as you suggested.

The only other piece of information I have is this wiki article: https://ja.wikipedia.org/wiki/%E7%AC%AC ... %E8%BB%8D)
It claims that Japanese operations against northern Sakhalin were supposed to be conducted by a new "26th Army" consisting of the 7th Division, "Kyoto" (53rd?) Division, and Karafuto Mixed Brigade, and that parachute landings were contemplated to capture Soviet oil fields. The cited source is Senshi Sosho, 『北東方面陸軍作戦〈1〉and〈2〉』.

--------------------------------------------------------------------------

Additionally, for comparison's sake I also have the complete composition of Soviet infantry, artillery, mechanized, air, and engineering forces in the Far East as of 1 September 1941 down to the battalion level, included below with relevant notes:

(Source (in Russian): "Battle Composition of the Soviet Army, 1941-1945" part 1, June-December 1941 pp. 47-48)
TRANS-BAIKAL MILITARY DISTRICT (HQ: Mt. Shirlova, Lake Baikal)
Directly subordinate
(Artillery and AAA)
- 106th, 216th, 413th Howitzer Artillery Regiments (RVGK)
- 13th Separate Mortar Battalion
- 3rd Air Defense Area Brigade
(Air Forces)
- 37th Mixed Aviation Division
- 2nd Mixed Aviation Brigade
- 318th Reconnaissance Aviation Regiment
(Engineering troops)
- 51st, 102nd Separate Engineer Battalions
- 1st, 15th Pontoon Bridge Battalions
17th Army (Mongolia)
(Infantry)
- 36th, 57th, 82nd Motor Rifle Divisions
(Mechanized)
- 61st Tank Division
- 9th Motorized Armored Brigade
- 9th Motorcycle Regiment
(Artillery and AAA)
- 185th Cannon Artillery Regiment (RVGK)
- 2nd Air Defense Area Brigade
(Air Forces)
None
(Engineering troops)
- 82nd Rolled Beam Bridge
36th Army (Trans-Baikal region)
(Infantry/Cavalry)
- 65th, 93rd, 94th, 114th Rifle Divsions
- 51st Cavalry Division
- 31st, 32nd Fortified Regions
(Mechanized)
- 111th Tank Division
- 33rd, 35th Separate Tank Battalions
(Artillery and AAA)
- 267th, 390th Corps Artillery Regiments
- 14th Separate Mortar Battalion
- 1st Air Defense Area Brigade
(Air Forces)
None
(Engineering troops)
- 39th Separate Sapper Battalion
Subtotal Trans-Baikal Military District
(Infantry/Cavalry)
- 7 Rifle Divisions
- 1 Cavalry Division
- 2 Fortified Regions
(Mechanized)
- 2 Tank Divisions
- 1 Motorized Armored Brigade
- 2 Separate Tank Battalions
- 1 Motorcycle Regiment
(Artillery and AAA)
- 6 Artillery Regiments
- 2 Separate Mortar Battalions
- 3 Air Defense Area Brigades
(Air Forces)
- 1 Mixed Aviation Division
- 1 Mixed Aviation Brigade
- 1 Reconnaissance Aviation Regiment
(Engineering troops)
- 5 Separate Engineer Battalions
- 1 Separate Sapper Battalion

FAR EASTERN FRONT (HQ: Khabarovsk)
Directly subordinate
(Infantry/Cavalry)
- Special Rifle Corps
--79th Rifle Division (Sakhalin Island)
--"Sakhalinskaya" Rifle Brigade (Sakhalin Island)
--101st Mountain Rifle Division (Petropavlovsk-Kamchatskiy)
--103rd, 104th Fortified Regions
(Artillery and AAA)
- 181st, 372nd Howitzer Artillery Regiments (RVGK)
- 5th AA Brigade
- 6th Air Defense Area Brigade
- Kamchatka and Sakhalin Air Defense Sectors
(Air Forces)
- 29th Fighter Aviation Division
- 53rd Bomber Aviation Division
- 5th Mixed Aviation Brigade
- 139th Bomber Aviation Regiment
- 71st Mixed Aviation Regiment
- 168th Reconnaissance Aviation Regiment
(Engineering troops)
- 26th Separate Engineer Battalion
- 101st Motorized Engineer Battalion
1st Army (Vladivostok, opposing Japanese 3rd Army and Hunchun Group)
(Infantry/Cavalry)
- 26th and 59th Rifle Corps
--22nd, 39th, 59th, 239th Rifle Divisions
-- 8th Cavalry Division
-- 6th Rifle Brigade
- 105th Fortified Region
(Mechanized)
- 58th, 112th Tank Divisions
- 3rd Separate Armored Train Battalion
(Artillery and AAA)
- 165th, 199th Howitzer Artillery Regiments (RVGK)
- 50th, 273rd Corps Artillery Regiments
- 115th, 129th Separate AA Battalions
- 4th Air Defense Area Brigade
(Air Forces)
- 33rd Bomber Aviation Division
- 32nd, 34th, 83rd Mixed Aviation Division
- 26th, 59th Corrective Aviation Squadrons
- 137th Reconnaissance Aviation Squadron
(Engineering troops)
- 29th Separate Engineer Battalion
25th Army (Voroshilov, opposing Japanese 3rd and 20th Armies)
(Infantry/Cavalry)
- 39th Rifle Corps
- 32nd, 40th, 92nd, 105th Rifle Divisions
- 2nd Rifle Brigade
- Separate Cavalry Regiment
- 106th, 107th, 108th, 110th, 111th, Fortified Regions
(Mechanized)
- 9th Separate Armored Train Battalion
(Artillery and AAA)
- 282nd, 548 Corps Artillery Regiments
- 215th, 386th, 549th Howitzer Artillery Regiments (RVGK)
- 21st Separate Mortar Battalion
- 5th Air Defense Area Brigade
(Air Forces)
- 70th Mixed Aviation Division
- 39th Corrective Aviation Squadron
- 138th Reconnaissance Aviation Squadron
(Engineering troops)
- 32nd Separate Engineer Battalion
- 100th Motorized Engineer Battalion
- 69th Separate Sapper Battalion
35th Army (Iman, opposing Japanese 5th Army)
(Infantry/Cavalry)
- 35th, 66th, 78th Rifle Divisions
- 109th Fortified Region
(Mechanized)
- 29th Motorcycle Regiment
- Separate Armored Train Battalion
(Artillery and AAA)
- 76th, 187th Corps Artillery Regiments
- 362nd, 367th Separate Artillery Battalions
- 110th Separate AA Battalion
- 3rd Air Defense Area Brigade
(Air Forces)
- 79th Fighter Aviation Division
- 18th Reconnaissance Aviation Squadron
(Engineering troops)
- 402nd Motorized Engineer Battalion
- 3rd, 9th, 20th, Motorized Pontoon Bridge Battalions
- 60th Separate Sapper Battalion
15th Army (Birobidzhan, north of Amur River and Sanjiang Plain/三江平原)
(Infantry/Cavalry)
- 34th Rifle Division
- 202nd Airborne Brigade
- 102nd Fortified Region
(Mechanized)
- 60th Tank Division
(Artillery and AAA)
- 52nd Corps Artillery Regiment
- 2nd Air Defense Area Brigade
(Air Forces)
- 69th Mixed Aviation Division
- 251st Airborne Bomber Aviation Division
- 140th Reconnaissance Aviation Squadron
(Engineering troops)
- 3rd Heavy Pontoon Bridge Regiment
- 11th, 23rd, 24th Pontoon Bridge Battalions
- 129th Separate Sapper Battalion
2nd "Red Banner" Army (Blagoveshchensk - opposing Japanese 4th Army)
(Infantry/Cavalry)
- 3rd, 12th, and "Svobodnenskaya" Rifle Divisions
- 101st and "Ust' - Bureyskiy" Fortified Regions
(Mechanized)
- 301st, 356th, 362nd Separate Tank Battalions
- 2nd Separate Armored Train Battalion
- 5th Separate Armored Car Battalion
(Artillery and AAA)
- 42nd Corps Artillery Regiment
- 114th, 411th, and 550th Howitzer Artillery Regiments
- 22nd Separate Mortar Battalion
- 1st Air Defense Area Brigade
(Air Forces)
- 95th Fighter Aviation Division
- 82nd Bomber Aviation Division
(Engineering troops)
- 2nd Heavy Pontoon Bridge Regiment
- 10th, 29th Pontoon Bridge Battalions
Subtotal Far East Front
(Infantry/Cavalry)
- 17 Rifle Divisions
- 1 Cavalry Division
- 3 Rifle Brigades
- 1 Airborne Brigade
- 1 Cavalry Regiment
- 12 Fortified Regions
(Mechanized)
- 3 Tank Divisions
- 1 Motorcycle Regiment
- 3 Separate Tank Battalions
- 4 Armored Train Battalions
- 1 Armored Car Battalion
(Artillery and AAA)
- 18 Artillery Regiments
- 2 Separate Artillery Battalions
- 2 Separate Mortar Battalions
- 1 AA Brigade
- 6 Air Defense Area Brigades
- 2 Air Defense Sectors
- 3 Separate AA Battalions
(Air Forces)
- 3 Fighter Aviation Divisions
- 5 Mixed Aviation Divisions
- 3 Bomber Aviation Divisions
- 1 Mixed Aviation Brigade
- 2 Bomber Aviation Regiments
- 1 Mixed Aviation Regiment
- 1 Reconnaissance Aviation Regiment
(Engineering troops)
- 2 Engineer Regiments
- 14 Separate Engineer Battalions
- 3 Separate Sapper Battalions

Grand total Far East Front + Trans-Baikal Military District:
(Infantry/Cavalry)
- 24 Rifle Divisions
- 2 Cavalry Divisions
- 3 Rifle Brigades
- 1 Airborne Brigade
- 1 Cavalry Regiment
- 14 Fortified Regions
(Mechanized)
- 5 Tank Divisions
- 1 Motorized Armored Brigade
- 5 Separate Tank Battalions
- 2 Motorcycle Regiments
- 4 Armored Train Battalions
- 1 Armored Car Battalion
(Artillery and AAA)
- 24 Artillery Regiments
- 2 Separate Artillery Battalions
- 4 Separate Mortar Battalions
- 1 AA Brigade
- 9 Air Defense Area Brigades
- 2 Air Defense Sectors
- 3 Separate AA Battalions
(Air Forces)
- 3 Fighter Aviation Divisions
- 6 Mixed Aviation Divisions
- 3 Bomber Aviation Divisions
- 2 Mixed Aviation Brigades
- 2 Bomber Aviation Regiments
- 1 Mixed Aviation Regiment
- 2 Reconnaissance Aviation Regiments
(Engineering troops)
- 2 Engineer Regiments
- 19 Separate Engineer Battalions
- 4 Separate Sapper Battalions

As for the Soviets' actual operational plans, while I don't have exact documents from 1941, the orders sent to the Far East and Trans-Baikal Fronts on 16 May 1942 (STAVKA directives 170149 and 170150) should still be very useful; by that time the composition of both forces was relatively unchanged (I can post this too if you want) and the situation in Europe was just as desperate. The overall plan envisioned an all-out defense in the border area with little regard for defense in depth. Apparently the closeness of both the Trans-Siberian Railway and the major cities to the Manchurian border prompted the Soviets to make this decision, on the hopes that their fortified regions could slow down the Japanese Army enough for their main forces to create a stalemate.

Specific instructions are summarized as follows:

Far East Front
- In the Maritime Province south of Lake Khanka, the 1st and 25th Armies will have strictly defensive missions, not allowing the Japanese Army onto the territory of the USSR. The entire strength of both these armies will be used for the defense of the border area.
- In the Iman region, the 35th Army will resist Japanese attacks for 5 days, after which it will go over to the counteroffensive with 2 divisions toward Baoqing (宝清镇), to be reached on the 25th day of the war. The 35th Army's remaining division, the 66th Rifle Division, will remain on the defensive.
- In the Sanjiang direction, the 15th Army will resist Japanese attacks for 5 days, after which it would go over to the counteroffensive toward Fujin (富锦镇), to be reached on the 25th day of the war.
- All available front reserves together with the Amur Red Banner flotilla will be committed to assist the progress of the 35th and 15th Armies.
- On the northern front, the 2nd "Red Banner" Army will defend the Blagoveshchensk region. The 2nd "Red Banner" Army's mission is strictly defensive and it will not cross the Amur river.
- Forces on Sakhalin and Kamchatka will hold out for as long as possible.
- Reinforcements from European Russia: 2 tank brigades, 3 artillery regiments equipped with 76.2 mm guns, 3 guards mortar regiments, and 5 armored trains with anti-air guns.

Trans-Baikal Front
- Starting no later than the 3rd day of the war, the 17th and 36th Armies will launch an offensive consisting of at least 6 Soviet divisions and 1-2 Mongol cavalry divisions toward lakes Buir and Hulun, to be reached by the 10th day of the war.
- Reinforcements from European Russia: 2 tank brigades, 2 artillery regiments equipped with 76.2 mm guns, and 3 guards mortar regiments.

Air Forces
In contrast to the Japanese, the Soviet Air Force did not strongly emphasize long-range disruptive strikes into the enemy rear areas. The main objective of the Soviet Air Force was to concentrate large numbers of aircraft in the tactical zone in order to provide support for ground operations; attacks on airfields, railways, bridges, ships, and so on were strictly secondary objectives. In particular, bombing raids on the Japanese mainland (historically a source of great apprehension among the Japanese High Command) were to be carried out by a mere 30 TB-3s (!!) to be launched in groups of 8-10 (!!!) against targets in Tokyo, Yokosuka, Maizuru, and Ominato.

Naval Forces
Soviet naval operations were mostly based around their submarines. At the outset of war the Soviets planned to mine the Tatar strait and mouth of the Amur river, while submarine patrols would begin in the Sea of Japan, Yellow Sea, and Sea of Okhotsk. Submarine operations would not be extended into the Pacific ocean, but would be limited to these areas, plus the eastern coast of Sakhalin island and Baykal bay. A small number of navy personnel were to be formed into a rifle brigade and placed under Army command for the defense of Vladivostok, alongside 2 Army brigades.

--------------------------------------------------------------------------

Compared with the Japanese plans, it seems that although Soviet forces south of Lake Khanka were relatively strong and in a position to hold out for a while, their 35th Army at Iman was seriously outmatched by the Japanese 5th Army. Moreover, this situation was made even worse by the expectation that 2/3 of the 35th Army's divisions were supposed to launch a counteroffensive. Based on this, it appears that the main Soviet force south of Iman was in danger of encirclement.
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fontessa
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Re: Composition of Japanese Forces in Northeast Asia, August 1941

#8

Post by fontessa » 30 Mar 2022, 16:13

Hello Bob,
BobTheBarbarian wrote:
26 Mar 2022, 08:20
The 35th Field Heavy Artillery Regiment (19th Division) is absent in December 1941.
Oh, I would like to correct as follows;
Was;
第19師団 19th Division
- 15th Field Heavy Artillery Regiment
- 35th Field Heavy Artillery Regiment
Is;
第19師団 19th Division
- 15th Field Heavy Artillery Regiment (Transferred to 19th Division on 1 August 1941. (命520, 43 C14060920300)
- 19th Field Machine Cannon Company (Transferred to 19th Division on 1 August 1941. (命520, 43 C14060920300)

BobTheBarbarian wrote:
26 Mar 2022, 08:20
AAA - the December 1941 organization shows the 41st and 47th AAA Battalions as well as the 35th, 41st, 42nd, 43rd, 44th, 45th Independent AAA Companies. Of these, the 47th AAA battalion and 35th Independent AAA company are absent in the September composition.
(1) 47th AAA battalion
Transferred to 19th Division on 1 August 1941. (命520, 43 C14060920300)
Transferred to 14th Army on (- 1 company) (命555, 15 C14060906600)
The rest company seems to have remained 19th Division.

(2) 35th Independent AAA company are absent
Transferred to 19th Division on 1 August 1941. (命520, 43 C14060920300)
Transferred to 15th Army on 6 November 1941. (命555, 43 C14060906500)

BobTheBarbarian wrote:
26 Mar 2022, 08:20
3) The 23rd Independent Engineer Regiment - I see that for September the 23rd Independent Engineer Replacement Unit is listed but not the regiment itself. Was the 23rd Independent Engineer Regiment not in Korea in August/September 1941?
Yes, I dropped it.
Transferred to 5th Army on 1 August 1941 (命520 33 C14060920400)
Transferred to 25th Army on 6 November 1941 (命555. 15 C14060906600)
It had been classified as 戊 Bo “E" Crossing River (Boat Maneuver) and was reorganized to 8th Shipping Regiment on 24 November 1942.

BobTheBarbarian wrote:
26 Mar 2022, 08:20
The only other piece of information I have is this wiki article: https://ja.wikipedia.org/wiki/%E7%AC%AC ... %E8%BB%8D)
It claims that Japanese operations against northern Sakhalin were supposed to be conducted by a new "26th Army" consisting of the 7th Division, "Kyoto" (53rd?) Division, and Karafuto Mixed Brigade, and that parachute landings were contemplated to capture Soviet oil fields. The cited source is Senshi Sosho, 『北東方面陸軍作戦〈1〉and〈2〉』.
Yes, I confirmed the above red part except “26th Army”. But it was a rough idea of the Chief of Staff and was not considered in detail. It is doubtful that a detailed examination was carried out until the war game could be implemented because only the diaries of the people concerned remained. And “26th Army "did not exist. In fact, it was vacant between the 25th Army (created on 5 July 1941 for the Malay Peninsula at the beginning of the war) and the 27th Army (created on 16 March 1944 for the Kuril Islands Defense).

BobTheBarbarian wrote:
26 Mar 2022, 08:20
Additionally, for comparison's sake I also have the complete composition of Soviet infantry, artillery, mechanized, air, and engineering forces in the Far East as of 1 September 1941 down to the battalion level, included below with relevant notes:
Thanks for the detail. It can be read that the Far Eastern Soviet Army did not have absolute confidence in the Kwantung Army, but is it true?
Convinced that there was no attack from Japan due to Sorge's intelligence, the Soviet Union strengthened Moscow's defense with the force pulled from the Far East. As a result, Germany could not break through this and the offensive end. It is believed like this. Is it true? If so, do you know how the units were pulled from the Far East?


fontessa

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Re: Composition of Japanese Forces in Northeast Asia, August 1941

#9

Post by BobTheBarbarian » 31 Mar 2022, 01:36

Hello fontessa,

Thanks for your comments and clarifications.
fontessa wrote:
30 Mar 2022, 16:13
Thanks for the detail. It can be read that the Far Eastern Soviet Army did not have absolute confidence in the Kwantung Army, but is it true?
Yes, the Soviet Army was not confident in its ability to defeat the Kwantung Army, nor did it believe that Japan gave up its plans for invading the Soviet Union, even if there was no attack in 1941. As for their military prospects, in 1941 the Far Eastern Front operations chief, Major General A. K. Kazakovtsev, told Petro Grigorenko that "if the Japanese enter the war on Hitler's side. . . our cause is hopeless." Grigorenko, who would rise to the rank of Major General, became a prominent dissident after the war and lived the last decade of his life in the United States. [Source: Alvin D. Coox, "Nomonhan: Japan against Russia" p. 1079]

The Kwantung Army was a serious strategic concern not just for the Soviet Union but also for the United States. After Pearl Harbor the U.S. hoped that the Soviet Union would declare war on Japan to prevent Kwantung Army forces from being used in the Pacific, and at the same time was anxious that Japan might attack Siberia, which could cause the Soviets to lose the war against Germany and therefore make it much harder for the Allies to defeat Hitler in Europe. Coox wrote in 1958:

"We dreaded and we feared the specter of the Kwantung Army. We pleaded with the Russians, since the very day of Pearl Harbor, to pin down the Kwantung Army, relieve pressure upon our hard-pressed forces in the Philippines, and thereby “save the Pacific” from the Japanese, as General MacArthur put it. At the same time we (and the Soviets) worried lest the Japanese assault the USSR first, like the jackal Mussolini had jumped the reeling French in 1940. . . . When, for example, the American Military Mission proposed to the Russians, in December 1943, that a U.S. supplied logistical base be set up east of Lake Baikal in Siberia, the Soviet Army authorities were shocked by the idea and literally turned white.”

Furthermore, over the course of the war both the United States and Soviet Union were unaware of the extent to which the Kwantung Army had been weakened and by 1945 still believed it was relatively strong. Soviet General Shtemenko wrote in his book "the Soviet General Staff at War" that in April 1945 "the deployment of large Japanese land forces along the Soviet border, and the proximity of the Japanese air and naval bases to Soviet territory made it possible for these rabid militarists to launch an attack on our vital installations and troops with very serious consequences for us." Similarly, before the Soviet invasion of Manchuria the U.S. created contingency plans to help the Soviet Army in the event the Kwantung Army repelled their attack and seized Vladivostok.

Prior to the invasion the Soviet Army's Main Military Directorate Operations Group estimated that their forces would suffer 540,000 "sanitary losses" (that is, wounded, sick, burned, and so on, but not including dead and missing), of whom 381,000 would be combat injuries; this implies overall losses would be in excess of 700,000, similar to those incurred during Operation "Bagration" in 1944. Rather than a "cheap" land-grab, the Soviet invasion of Manchuria was intended to be a real "Second Front" in the same sense that the Allied landing in Normandy was a "Second Front" in the European theater. This fact is obscured by the war's unexpected end in August 1945, but at the time U.S. planners believed fighting could continue to the end of February 1947 based on the military correlation of forces.
fontessa wrote:
30 Mar 2022, 16:13
Convinced that there was no attack from Japan due to Sorge's intelligence, the Soviet Union strengthened Moscow's defense with the force pulled from the Far East. As a result, Germany could not break through this and the offensive end. It is believed like this. Is it true? If so, do you know how the units were pulled from the Far East?
This is partly correct. The Soviet Union did transfer significant forces from the Far East (as well as Central Asia), and they were indeed an important reason for the failure of the German offensive, but they were not the only factor.

When the Germans invaded in June 1941 they hoped they could destroy the majority of the Soviet Army between the border area and the Dnieper river and that Soviet morale would quickly collapse, but these assumptions turned out to be false. As a result, the campaign became unexpectedly protracted. Meanwhile, without adequate logistical support, the German army suffered from supply shortages and became bogged down in heavy mud without preparations for extended combat in the winter. (The parallels with the current situation are, shall we say, "interesting.") At that point, the Soviet Union started to recover from its initial defeats and thanks to foreign aid from the U.S. and Britain, together with the military operations of those countries on other fronts, they began to push the Germans back.
fontessa wrote:
30 Mar 2022, 16:13
If so, do you know how the units were pulled from the Far East?
On 1 June 1941 Soviet Army forces east of Lake Baikal totaled approximately 650,000 men (32 divisions), 5,400 tanks, and 3,000 aircraft. (The numbers of tanks and aircraft appear to include those in storage as well as directly assigned to combat units.) Of the above, 660 tanks and 347 aircraft were reported as "inoperable" due to repair needs or other causes.

Prior to 22 June 1941 Soviet forces were reduced by 5 divisions: 57,000 men, 670 artillery pieces, and 1,070 tanks. From July to November 1941 another 13 divisions were also pulled from the Far East: 122,000 men, 2,000 artillery pieces and mortars, 1,500 tractors, and nearly 12,000 motor vehicles. Finally, from 22 June to 1 December, 2,209 tanks were transferred from "east" to "west." (Many of these must have already been assigned to the European armies as an administrative matter - officially on 22 June 1941 there were only 3,188 tanks and self-propelled guns in the Far East.)

Therefore, during this period the Soviet Union transferred more than 1/2 of its original divisions to the European theater. Although new divisions were quickly created to replace them and total manpower levels climbed to more than 1 million due to wartime mobilization, the average combat effectiveness of the new units was considerably less than that of the originals and many divisions that escaped transfer were also negatively affected by losses of officers and equipment.

As for the tanks, according to official statistics, by 1 December the number of tanks remaining in the Far East decreased from the original 5,400 to 2,124. If we also consider that another 600 to 700 tanks left behind were inoperable due to various causes, it means there were about 1,500 operable tanks in the Far East at that time, that is, less than 1/3 of the original total. All tanks in the Far East were of the T-26, BT, and similar older models; there were no KV or T-34s present at that time. Based on the composition of the armored forces given for June and September 1941, it appears that most of the tanks sent to European Russia came not from active combat units but from storage depots in Siberia.

The number of aircraft does not appear to have decreased as drastically as the number of tanks. The official statistics report that Soviet Army and Navy forces had a combined 4,140 aircraft in the Far East on 22 June 1941 (compare with the above total of 3,000, specifically 3,021 Army planes on 1 June). According to the same statistics, by 1 December the combined Army-Navy air forces had a total of 3,193 aircraft, down about 1,000 from June. One can estimate based on the Army's 11.5% "inoperable" rate that approximately 2,700 of these were actually operable. As with the tanks, the majority of Soviet aircraft were older models: I-15 and 1-16 fighters, though the bomber forces consisted mostly of more modern SBs.

The number of Navy ships (mostly submarines) totaled 94 on 22 June 1941 and 96 on 1 December.

Although Soviet military transfers were considerable, most of them took place only after it became clear Japan would not attack the Soviet Union in 1941; changes prior to fall 1941 were significantly smaller (for example, only 4 of the 13 divisions transferred between 22 June and 1 December 1941 were assigned to Europe before 1 September). These were (in red text):

Trans-Baikal Military District
Direct Control
-12th Rifle Corps
--65th, 94th Rifle Divisions
-93rd, 114th Rifle Divisions
-17th Army
--36th, 57th Motor Rifle Divisions
--57th, 61st Tank Divisions
--82nd Motorized Division (later re-designated as "82nd Motor Rifle Division")

Far Eastern Front
Direct Control
-Special Rifle Corps
--79th Rifle Division (Sakhalin Island)
--101st Mountain Rifle Division (Petropavlovsk-Kamchatskiy)
-35th, 66th, 78th Rifle Divisions
1st Army (Vladivostok)
-26th Rifle Corps
--21st, 22nd, 26th Rifle Divisions
-59th Rifle Corps
--39th, 59th Rifle Divisions
30th Mechanized Corps
--58th, 60th Tank Divisions
--239th Motorized Division (later re-designated as "239th Rifle Division")
-8th Cavalry Division
25th Army (Voroshilov)
-39th Rifle Corps
--32nd, 40th, 92nd Rifle Divisions
-105th Rifle Division
15th Army (Birobidzhan)
-18th Rifle Corps
--34th Rifle Division
--202nd Airborne Brigade
2nd Army (Blagoveshchensk)
-3rd, 12th Rifle Divisions
-59th Tank Division
-69th Motorized Division

In general terms, on 22 June 1941 the Trans-Baikal Military District and Far Eastern Front had the following totals:

Trans-Baikal Military District
(Infantry/Cavalry)
- 1 Rifle Corps
- 6 Rifle Divisions
- 1 Fortified Region
(Mechanized)
- 2 Tank Divisions
- 1 Motorized Division
- 1 Motorized Armored Brigade
(Artillery and AAA)
- 4 Artillery Regiments
- 1 Separate Mortar Battalion
- 3 Air Defense Area Brigades
- 1 Separate AA Battalion
(Air Forces)
- 1 Fighter Aviation Division
- 2 Mixed Aviation Divisions
- 1 Bomber Aviation Division
- 1 Mixed Aviation Brigade
- 1 Fighter Aviation Regiment
- 1 Air Defense Fighter Aviation Regiment (the 9th IAP PVO)
- 1 Mixed Aviation Regiment
- 1 Reconnaissance Aviation Regiment
(Engineering Troops)
- 2 Engineer Regiments
- 1 Separate Engineer Battalion
- 1 Separate Sapper Battalion

Far Eastern Front
(Infantry/Cavalry)
- 5 Rifle Corps
- 17 Rifle Divisions
- 1 Cavalry Division
- 3 Rifle Brigades
- 1 Airborne Brigade
- 12 Fortified Regions
(Mechanized)
- 1 Motorized Corps
- 3 Tank Divisions
- 2 Motorized Divisions
- 1 Motorcycle Regiment
- 3 Armored Train Battalions
- 1 Armored Car Battalion
(Artillery and AAA)
- 18 Artillery Regiments
- 6 Separate Artillery Battalions
- 2 Separate Mortar Battalions
- 1 AA Brigade
- 5 Air Defense Area Brigades
- 5 Separate AA Battalions
(Air Forces)
- 1 Bomber Aviation Corps
- 2 Fighter Aviation Divisions
- 5 Mixed Aviation Divisions
- 2 Bomber Aviation Divisions
- 1 Mixed Aviation Brigade
- 1 Air Defense Fighter Aviation Regiment (18th IAP PVO)
- 1 Mixed Aviation Regiment
- 2 Reconnaissance Aviation Regiments
(Engineering Troops)
- 7 Engineer Regiments
- 1 Separate Engineer Battalion
- 3 Separate Sapper Battalions

Total divisions: 32 (31 on 1 September)
Total artillery regiments: 22 (24 on 1 September)
Total air divisions: 13 (12 on 1 September)
Total engineer regiments: 9 (2 on 1 September, though the number of battalions greatly increased)

If you want to know the specific composition of the various Soviet armies and air units at certain dates, I can post that too.
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Re: Composition of Japanese Forces in Northeast Asia, August 1941

#10

Post by BobTheBarbarian » 06 Apr 2022, 22:55

Hi fontessa,
fontessa wrote:
12 Feb 2022, 08:09
Below is the composition of the Army Air Force at the time of "Kwantung Army Special Maneuvers". Most of them were stationed in Manchuria and the rest was dispatched to French Indochina.
It's interesting to compare this composition with those provided in JM-151, "Air Operations Record against Soviet Russia" (PDF can be downloaded from here http://ddsnext.crl.edu/titles/31862?ter ... 298%2C5148, it may take awhile). In this document, the following table is given for the Japanese Army Air Force in June 1941:

Manchuria and North Korea (81 squadrons, about 830 planes)
2nd Air Group
-2nd Air Brigade
--9th Air Regiment (F)
--6th Air Regiment (LB)
--65th Air Regiment (LB)
-8th Air Brigade
--33rd Air Regiment (F)
--16th Air Regiment (LB)
-6th Air Brigade
--78th Air Regiment (F)
--66th Air Regiment (LB)
--58th Air Regiment (HB)
-Direct Control
--70th Air Regiment (F)
--68th Air Regiment (F)
--32nd Air Regiment (LB)
--28th Air Regiment (HR)(Headquarters Reconnaissance)
--83rd Air Regiment (AR-DSR)(Army Reconnaissance, Direct Support Reconnaissance)
5th Air Group
-9th Air Brigade
--24th Air Regiment (F)
--45th Air Regiment (LB)
--61st Air Regiment (HB)
-10th Air Brigade
--77th Air Regiment (F)
--31st Air Regiment (LB)
--10th Air Regiment (HR)
-12th Air Brigade
--1st Air Regiment (F)
--8th Air Regiment (F)
-13th Air Brigade
--85th Air Regiment (F)
--87th Air Regiment (F)
-Direct Control
--15th Air Regiment (HR)
Paichengtzu (白城子) Air School
-204th Air Instruction Brigade
-208th Air Instruction Brigade
-95th Air Instruction Brigade

China (31 squadrons, about 300 planes)
North China
-1st Air Brigade
--10th Independent Air Squadron (F)
--16th Independent Air Squadron (HR)
--83rd Independent Air Squadron (AR)
--90th Independent Air Squadron (LB)
--12th Air Regiment (HB)
--98th Air Regiment (HB)
--29th Air Regiment (AR-DSR)
Central China
-8th Air Brigade
--18th Independent Air Squadron (HR)
--44th Air Regiment (AR-DSR)
--59th Air Regiment (F)
--75th Air Regiment (LB)
--60th Air Regiment (HB)
South China
-7th Air Brigade
--64th Air Regiment (F)
--27th Air Regiment (LB)

French Indo-China (2 squadrons, about 20 planes)
-21st Independent Air Unit
--82nd Independent Air Squadron (AR)
--84th Independent Air Squadron (F)

Japan (24 squadrons, about 240 planes)
1st Air Group
4th Air Brigade
--50th Air Regiment (F)
--8th Air Regiment (LB)
--14th Air Regiment (HB)
Direct Control
--2nd Air Regiment (HR-DSR)
--5th Air Regiment (F)
--7th Air Regiment (HB)
--13th Air Regiment (F)
--62nd Air Regiment (HB)

And for the Kwantung Army Air Corps "at the end of 1941:"

Air Corps Headquarters
2nd Air Group
-2nd Air Brigade
--9th Air Regiment (F)
--6th Air Regiment (LB)
--65th Air Regiment (LB)
-6th Air Brigade
--78th Air Regiment (F)
--66th Air Regiment (LB)
--58th Air Regiment (HB)
-8th Air Brigade
--33rd Air Regiment (F)
Under direct control of Air Corps Headquarters
-24th Air Regiment
-45th Air Regiment
-9th Air Brigade
--7th Air Regiment (HB)
--61st Air Regiment (HB)
-13th Air Brigade
--85th Air Regiment (F)
--87th Air Regiment (F)
Paichengtzu (白城子) Instruction Air Brigade
--204th Air Regiment (F)
--208th Air Regiment (LB)
--95th Air Regiment (HB)

Compared with what you wrote, there are several differences that can probably be credited to changes in the organizational structure over time (I believe your website cites an order from July 12, 1941). However, there are two that are especially interesting at the moment:

1) The 65th Air Regiment:
In both the June and December tables above, the 2nd Air Brigade consists of the 6th, 9th, and 65th Air Regiments. In your table, it has the 6th and 9th Regiments and 29th Independent Air Unit. Is "65th Air Regiment" an error? At the end of the PDF, there is a list of units transferred both to and from Manchuria from July 1941 to August 1945, where the 65th Regiment is only mentioned being sent out from Manchuria on 6 May 1944, when it was sent to the Southern Army. Elsewhere, 65th Regiment is mentioned being temporarily sent to China for one month in 1942.

2) The "6th Air Brigade:"
Similarly, JM-151 lists a "6th Air Brigade" under the 2nd Air Group for both June and December 1941, consisting of the 78th, 66th, and 58th Air Regiments. According to the appendix, it was only transferred on 6 May 1944. In your table, this position is instead occupied by the "7th Air Brigade." Did JM-151 make a mistake?

Thanks
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Re: Composition of Japanese Forces in Northeast Asia, August 1941

#11

Post by fontessa » 07 Apr 2022, 09:36

Hello Bob,

Thanks for your detailed answer about the Soviet Army. I apologize for the delay in my answer to your answer. It's still unbelievable because Kwantung Army was feared by the Soviet Army like your answer. Also, the Soviet Army's OOB is very interesting. Thank you again.


Actually, I don't know much about JM. Who were their authors?
BobTheBarbarian wrote:
06 Apr 2022, 22:55
1) The 65th Air Regiment:
In both the June and December tables above, the 2nd Air Brigade consists of the 6th, 9th, and 65th Air Regiments. In your table, it has the 6th and 9th Regiments and 29th Independent Air Unit. Is "65th Air Regiment" an error? At the end of the PDF, there is a list of units transferred both to and from Manchuria from July 1941 to August 1945, where the 65th Regiment is only mentioned being sent out from Manchuria on 6 May 1944, when it was sent to the Southern Army. Elsewhere, 65th Regiment is mentioned being temporarily sent to China for one month in 1942.
Sorry I have dropped 65th Air Regiment in 2nd Air Brigade.
BobTheBarbarian wrote:
06 Apr 2022, 22:55
2) The "6th Air Brigade:"
Similarly, JM-151 lists a "6th Air Brigade" under the 2nd Air Group for both June and December 1941, consisting of the 78th, 66th, and 58th Air Regiments. According to the appendix, it was only transferred on 6 May 1944. In your table, this position is instead occupied by the "7th Air Brigade." Did JM-151 make a mistake?
Yes, I think so.
6th Air Brigade of the below composition was added to 2nd Air Group on 31 March 1942 with IJHQ Army No,608 dated 20 March 1942,
- 32nd Air Regiment (LB)
- 60th Air Regiment (LB)
- 70th Air Regiment (F)
6th Air Brigade HQ completed the organization on the same day with Army Regulation “A” No.18.
7th Air Brigade was transferred from Kwantung Army to 3rd Air Group / Southern Army with IJHQ Army No.555 dated 6 November 1941.
- 12th Air Regiment (HB)
- 60th Air Regiment (HB)
- 64th Air Regiment (F)
- 98th Air Regiment (HB)

fontessa

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Re: Composition of Japanese Forces in Northeast Asia, August 1941

#12

Post by fontessa » 08 Apr 2022, 18:24

Hello Bob,
BobTheBarbarian wrote:
06 Apr 2022, 22:55
And for the Kwantung Army Air Corps "at the end of 1941:"

Air Corps Headquarters
2nd Air Group
-2nd Air Brigade
--9th Air Regiment (F)
--6th Air Regiment (LB)
--65th Air Regiment (LB)
-6th Air Brigade
--78th Air Regiment (F)
--66th Air Regiment (LB)
--58th Air Regiment (HB)
-8th Air Brigade
--33rd Air Regiment (F)
Under direct control of Air Corps Headquarters
-24th Air Regiment
-45th Air Regiment
-9th Air Brigade
--7th Air Regiment (HB)
--61st Air Regiment (HB)
-13th Air Brigade
--85th Air Regiment (F)
--87th Air Regiment (F)
Paichengtzu (白城子) Instruction Air Brigade
--204th Air Regiment (F)
--208th Air Regiment (LB)
--95th Air Regiment (HB)
-2nd Air Brigade
--9th Air Regiment (F)
--6th Air Regiment (LB)
--65th Air Regiment (LB)
-8th Air Brigade
--33rd Air Regiment (F)
--32nd Air Regiment (LB)
--8th Air Regiment (HB)
-28th Independent Air Unit: Reorganized from 28th Air Regiment
--66th Independent Air Squadron (DC)
--67th Independent Air Squadron (AR)
-29th Independent Air Unit: Reorganized from 29th Air Regiment
--63rd Independent Air Squadron (HR)
--81st Independent Air Squadron (HR)
Under direct control of Air Corps Headquarters
-70th Air Regiment (F)
-7th Air Regiment (HB)
-206th Independent Air Unit
--54th Independent Air Squadron (AR)
-6th Direct Cooperation Unit
-7th Direct Cooperation Unit
-9th Air Brigade
--24th Air Regiment (F)
--45th Air Regiment (LB)
--61st Air Regiment (HB)
-13th Air Brigade
--85th Air Regiment (F)
--87th Air Regiment (F)
Paichengtzu (白城子) Instruction Air Brigade
--208th Air Instruction Regiment (LB)
* 6th Air Brigade didn't exist at this time as already I said.
** 7th Air Brigade had been transferred to 3rd Air Group.

Source: IJA 戦闘序列 / 編組 (OOB / Henso) prepared by 防衛研修所戦史室 National Institute for Defense Studies War History Room.
I believe it is very reliable.
Remark: 戦闘序列 and 編組 were strictly distinguished in IJA as follows;
戦闘序列 OOB: The compositions of units already in combat.
編組 Henso: The compositions of units not in combat. For example all units in Manchuria / Korea / Taiwan and Japan Mainland.

The others are under checking.
I would like to show the results as soon as possible.


fontessa

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Re: Composition of Japanese Forces in Northeast Asia, August 1941

#13

Post by BobTheBarbarian » 08 Apr 2022, 23:04

Hello fontessa,
fontessa wrote:
07 Apr 2022, 09:36
Hello Bob,

Thanks for your detailed answer about the Soviet Army. I apologize for the delay in my answer to your answer. It's still unbelievable because Kwantung Army was feared by the Soviet Army like your answer. Also, the Soviet Army's OOB is very interesting. Thank you again.
There is no need to apologize; earlier I waited almost a month to respond to you, so I would be a hypocrite if I got offended! :D In any case, this is a casual forum so any sort of "deadlines" are unnecessary for obvious reasons. If you have any more questions about the Soviet Far East forces, requests for sources, and so on I will do my best to answer them.

(PS - this subject (Japanese-Soviet military preparations), together with the planned US invasion of Japan (Operation Downfall) are probably the two aspects of the Pacific War that I have done the most research on over the years; consequently, I have quite a bit of information on both of them. If you would like to see information on the "Downfall" plans; OOBs, landing schedules, operational orders, and so on I can share those too.)
fontessa wrote:
07 Apr 2022, 09:36
Actually, I don't know much about JM. Who were their authors
Essentially, they are a series of historical manuscripts that became the "skeleton" of Senshi Sosho.

The Japanese Monographs (usually abbreviated as "JM-###") were written by former officers of the Japanese military from 1945 to 1960, under the direction of the US Army's Center for Military History. They were originally written in Japanese, then translated to English. The purpose of these monographs was to document the experience of the Japanese Armed Forces in World War II both for research purposes and to incorporate possible "lessons learned" into US military methods. When Senshi Sosho was written in the 1960s and 1970s, the monographs and their related studies were combined with materials returned in 1958 and edited by the Japanese War History Office in Tokyo.

The Monographs cover every major front and every major operation carried out by the Japanese Armed Forces during World War II, including a 5-part series on "Political Strategy Prior to the Outbreak of War" (JM-144 through 152) and defense efforts in preparation for the US invasion of Japan. Overall 185 monographs were prepared. Some are short due to lack of source material or qualification on the part of the authors, but others are very long, hundreds of pages, and are written and edited by former members of the Imperial General Staff.

During the period from 1955 to 1960, an additional set of documents, the "Japanese Studies on Manchuria" (JSOM or JSSM) were published "under the direction and guidance of the Japanese consultants of the Japanese Research Division." These studies number from 1 to 13 and deal primarily with Japanese planning against the Soviet Union, climate factors, military geography, and so on. Lastly there was the "Night Combat Study" prepared around this time as well.

For examples of the level of detail, JM-151 (mentioned earlier) was written by Lt. Col. Sato Katsuo, former staff officer of the 2nd Air Army. As it says in the preface, "In addition to his personal papers and recollections, Col. Sato used as source material the available records of units involved and interrogation of former officers with knowledge of the operations." Meanwhile, JSOM vol. 1, "Japanese Operation Planning Against the USSR" was the result of the combined efforts of the following 23 officers:

- General Sadamu Shimomura (Operations)
- Lt. Gen. Kawabe Torashiro (Operations)
- Lt. Gen. Goro Isoya (Logistics)
- Lt. Gen. Inada Masazumi (Operations)
- Maj. Gen. Harada Sadanori (Air Force)
- Maj. Gen. Yamaguchi Tsuchio (Air Force)
- Col. Yabe Chuto (Intelligence)
- Col. Hattori Takushiro (Operations, Organization)<-- Col. Hattori was in charge of coordinating the efforts of each contributor to this particular study
- Col. Horiba Kazuo (Operations, Logistics)
- Col. Kawamura Benji (Railway)
- Col. Miyashi Minoru (Air Force)
- Col. Tsuji Masanobu (Operations)
- Col. Shimanuki Takeji (Operations)
- Col. Imoto Kumao (Operations)
- Col. Akiyama Monjiro (Air Force)
- Col. Takayama Nobutake (Fortress, Logistics)
- Lt. Col. Ishiwari Heizo (Organization)
- Lt. Col. Prince Takeda Tsunenori (Operations)
- Lt. Col. Mizumachi Katsushiro (Operations, Air Force)
- Lt. Col. Sato Katsuo (Air Force)
- Lt. Col. Hara Shiro (Operations)
- Lt. Col. Asaeda Shigeharu (Operations)

As you can see, it's quite the list of names. Today all the Japanese Monographs and (as far as I can tell) most of the Studies on Manchuria are freely available online.
fontessa wrote:
07 Apr 2022, 09:36
Sorry I have dropped 65th Air Regiment in 2nd Air Brigade.
...

Yes, I think so.
6th Air Brigade of the below composition was added to 2nd Air Group on 31 March 1942 with IJHQ Army No,608 dated 20 March 1942,
- 32nd Air Regiment (LB)
- 60th Air Regiment (LB)
- 70th Air Regiment (F)
6th Air Brigade HQ completed the organization on the same day with Army Regulation “A” No.18.
7th Air Brigade was transferred from Kwantung Army to 3rd Air Group / Southern Army with IJHQ Army No.555 dated 6 November 1941.
- 12th Air Regiment (HB)
- 60th Air Regiment (HB)
- 64th Air Regiment (F)
- 98th Air Regiment (HB)

fontessa
Thank you for this clarification. So based on the available material, it shouldn't be too difficult to solve this mystery. If we compare JM-151's claims for June and December with your figures for July (?), we get the following discrepancies:

Air Regiments listed in June (JM-151) not July
78th Air Regiment (F)
66th Air Regiment (LB)
68th Air Regiment (F)
10th Air Regiment (HR)
8th Air Regiment (F)
204th Air Regiment (F)
95th Air Regiment (HB)

Air Regiments listed in June and December in JM-151 but not July
78th (F)
66th (LB)
204th (F)
208th (LB)
95th (HB)

JM-151 also has a complete list of units activated and transferred both to and from Manchuria that may be useful; I will post this soon.

(PPS - this post was written before I saw your latest information. I will adjust to account for that.)
The Miracle of Lanciano: Jesus' Real Presence in the Holy Eucharist: https://web.archive.org/web/20060831022 ... tents.html

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Re: Composition of Japanese Forces in Northeast Asia, August 1941

#14

Post by fontessa » 18 Apr 2022, 11:40

Hello Bob,

Thanks for the explanation for JMs.
BobTheBarbarian wrote:
08 Apr 2022, 23:04
Air Regiments listed in June (JM-151) not July
78th Air Regiment (F)
66th Air Regiment (LB)
68th Air Regiment (F)
10th Air Regiment (HR)
8th Air Regiment (F)
204th Air Regiment (F)
95th Air Regiment (HB)
Sorry, I reread the above many times. But I couldn’t catch it.
Do you mean the above is the composition of 6th Air Brigade in June 1941?
BobTheBarbarian wrote:
08 Apr 2022, 23:04
Air Regiments listed in June and December in JM-151 but not July
78th (F)
66th (LB)
204th (F)
208th (LB)
95th (HB)
Do you mean the above is the composition of 6th Air Brigade in June and December 1941?

fontessa

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