Obscure Details Changkufeng Incident/Lake Khansan 1938

[PassandReviewofWW2]

July 1938 Newsprint report that an Undeclared War was being fought in a remote corner of the World between The Imperial Japanese Army and Russia.
By not Declaring War differences could be settled on the spot and to not make a big deal out of it, kind of Strategy.
The Problem, The Tumen River after flooding, erosion, silting, now coursed to the West in a Horseshoe configuration, and in the upheaval, Border Markers were displaced or removed, and any area without Markers could be considered unclaimed Territory .
Border parties from both sides confronted each other while Diplomatic measures to reach an agreement for another survey continued.
The River serving Commercial Traffic new jog to the west was a concern now requiring gunboat escort at times.
Repeated reports of aggressive/hostile Patrolling to higher command resulted in tension and drawing the attention of both Military Commanders tasked with handling such matters.
Border parties confronting each other in the areas without markers was turning into a free for all with missing and killed on both sides, to settle the issue both Commanders solutions were simultaneous.
IJA 19th Infantry Division Army of Korea Commander General Suetaka Kamezo plan was to seal the area off completely before a full scale battle could develop.
Russian 39th Rifle Corps Commander Marshal Vasili Blyukher plan was to place soldiers as Border Markers until the official result could be had, and to preclude any further misunderstandings and wild firing over approximate Border delineation uncertainty .
The day to day situation reports recorded a repeating course of events.
July 20, 1938 Russian Rifle Battalion with battery of guns observed near Paksikori North of Lake Khansan
July 21, 1938 IJA Regular Army observed crossing Tumen east into area. 9th Company 75th Reg 19th Infantry Division

July 30-31, 1938 The glue comes off, IJA 1st Battalion 75th Reg 19th Infantry Division conducts direct assault to take Changkufeng Heights, and to not fires their Rifles for any reason
The Resources of both Military Commanders could now be applied:
IJA General Suetaka Kamezo began committing Regiments of the 19th Infantry Division
Soviet Marshal Blyukher s hand held some impressive cards, Close Air Support Bombers, Long Range Artillery, Self Propelled Artillery BT 5 version,
Modern Tanks of Firepower and Mobility organized into Mechanized Brigades and Tank Battalions.
August 1-8 , 1938 When the battle transitioned to positional fighting Marshal Blyukhers Artillery and Bombing wrecked each IJA Position in the area.

[PassandReviewofWW2]

The Self Propelled Artillery Version of the BT Tank Series became the BT 7A,
The Reported Self Propelled Artillery reported in service as of 1935 may also have included the SU-12(Self Propelled)
using the GAZ 4 Truck with a 76mm Gun mounted on the Back
Details of exactly which version was on Hand are unclear
At Khalkhin Gol , the BT 7A receives very brief mention , of that there were BT 7As there.
Service Histories are almost nonexistent for the Field Expedient SU-12 Truck mounted Artillery

Many of the BT 7A appeared during Operation Barbarossa in the Western Military District and Kiev Military District and were lost during first days of action
Ref Source Light Tanks T26-T70 Michael Baryatinski