So far I have this
6th Army (II)
Formed 25 August 1941 after a Stavka directive of the same day [Russkij Arhiv 5(1):#477] from the headquarters of the 18th Rifle Corps, other sources say 48th Rifle Corps which General Malinovskij commanded, and the Pension Lists state the the army headquarters was just the renamed headquarters of the Reserve Army Southwestern Front (I) [Perechen 1.2].* Disbanded 10 June 1942.
Major General (Lieutenant General 09.11.1941) R. Â. Malinovskij (25.08.1941 – 24.12.1941)
Commander (?) (25.12.41 - 01.01.42)**
Major General (Lieutenant General 27.03.1942)*** A. M. Gorodnânskij (02.01.1942 – 27.05.1942)**** (x)
Commander (?) (28.05.42 - 10.06.42)
GM Malinovskij was appointed commander of the army in the same directive that order its formation.
* Needs to be sorted out. Probably so simple as 18th and 48th Rifle Corps headquarters were converted to an army headquarters, Reserve Army South Front (I), which in turn was renamed 6 Army (II).
** Maybe the army's chief-of-staff Major General (09.11.41) A. G. Batûnâ
*** Other sources say May 1942.
**** Other sources say he assumed command on 25 January 1942 and/or removed from command on 20 May 1942.
There are a number of points of uncertainty (more than most) concerning this Army.
What caused me to write was I stumbled across this forum post
Circumstances concerning the death of Lieutenant General A. M. Gorodnânskij. What the post claims is that the Soviet detailed certain officers to kill other officers to prevent there capture. Among others Kirponos, Kostenko and Gorodnânskij are listed. This must certainly be a Soviet myth, I have never seen anything in the English literature, where it is usually commented that the Soviet went to some lenght to try and save generals trapped in encirclements (that they might be tried and shot later is another story). Do anyone have more information?