Independent Operational Group Polesie

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). The SGO was to prevent Polish forces in central Poland from being encircled from the east. ==Operational history==

From 14 September the units of the SGO faced the German XIX Panzer Corps under Heinz Guderian. The forces under general Konstanty Plisowski defended the town of Brześć (Brest) from 16 to 19 September while the forces under colonel Adam Epler defended Kobryń from 16 to 18 September. ==Organization==

The SGO was commanded by general Franciszek Kleeberg, his chief of staff was colonel M. Łapicki. Kleeberg was tasked with organizing his group from various small units in the Polesie region; most of them were either reserve and mobilizing or second line such as the National Defense units; the notable exception were the elite Border Protection Corps (KOP) units and the Riverine Flotilla of the Polish Navy. On 14 September, when the group was engaged by German forces, it was composed of: • "Kobryń Group" (seven infantry battalions) - under col. Adam Epler • "Brześć Group" (five infantry battalions, two light tank companies, two armored trains under gen. Konstanty Plisowski • "Drohiczyn Poleski Group" (three infantry battalions) - under col. Kazimierz Gorzkowski • "Jasiołda Group" (one infantry battalion) - under mjr Ludwik Rau • Riverine Flotilla of the Polish Navy Over the next two weeks the group sustained casualties but it was also reinforced by various units from the disintegrating Polish army, including defenders of the Sarny Fortified Area. The total strength of the SGO was 18,000 soldiers. On 29 September, after reorganization, the group was composed of: • Polish 50th Infantry Division (reserve, later nicknamed "Brzoza" after its commander) under col. Ottokar Brzoza-Brzezina • Polish 60th Infantry Division (reserve, later nicknamed "Kobryń") under col. Adam Epler • Improvised Cavalry Division "Zaza" (pl) (improvised, nicknamed "Zaza") under gen. Zygmunt Podhorski (mostly based on Podlaska Cavalry Brigade and Suwalska Cavalry Brigade from Independent Operational Group Narew) ==Notes==