Independent Operational Group Polesie

[1][2] The SGO was created on the orders of the Polish Commander in Chief on 9 and 11 September due to German breakthroughs and was tasked with defending the region of Polesie (see also Polesie Voivodeship), defined by the lines of Muchawiec and Prypeć rivers, with the towns of Brześć (Brest) and Pińsk (where the SGO HQ was located).

[3] On 28 September Warsaw capitulated; Kleeberg - at that time having crossed the Bug river near Włodawa - decided that the units would advance west and organize large scale partisan warfare from local forest complexes near Świętokrzyskie Mountains.

From 2 October the SGO, at that point the last organized regular unit of the Polish Army, fought against the German forces of XIV Mechanized Corps in the battle of Kock.

Despite immense German numerical superiority, the Polish forces were able to score several tactical victories; however they were increasingly running low on supplies, including ammunition.

On 29 September, after reorganization, the group was composed of: a ^ Stanisław Maczek, another Polish commander with the reputation of being undefeated, was promoted from colonel to general in November 1939 after his 10.

Forces as of 31 August and German plan of attack.
Forces as of 14 September with troop movements up to this date.
Forces after 14 September with troop movements after this date; note Polesie Group near Kock