During the Battle of Kock, Polish airmen flew in the SGO Polesie platoon. Polish airmen threw hand grenades at German troops. On October 4, their PWS-26 aircraft was damaged and was unsuitable for further operations.
Janina Lewandowska born on 1908 in Kharkiv. She graduated from the Higher School of Pilotage and in the field of radio telegraphy in Lviv and Dęblin. As the first woman in Europe, she made a parachute jump from a height of 5 km. She took part in the September Campaign. She joined the personnel of Air Base No. 3. Taken prisoner by the Soviets around September 20, near Husiatyn. She stayed in the camps in Ostaszków and Kozielsk. Murdered by NKVD officers by the decision of the Political Bureau of the Central Committee of the VKP (b) of March 5, 1940, probably on her 32nd birthday, April 22, 1940. She was buried in the area of the present Polish War Cemetery in Katyn. A few days earlier, her sister Agnieszka Dowbor-Muśnicka was shot by the Germans in Palmiry.
On October 2, 1939, the Independent Operational Group “Polesie” under the command of General Franciszek Klebeerg clashed with the 14th Motorized Corps of General von Wietersheim. Fighting until October 6, was the last regular battle of the Polish army fought in the September campaign. After the Soviet aggression on September 17 and the cutting off of the evacuation route to Romania, General Kleeberg decided to embark on a relief trip to besieged Warsaw. On the way west, the SGO fought heavy, victorious battles with the Soviet army, including near Jabłonie and Milanów near Parczewo. On October 1, she entered into fire contact with the 13th DPZmot. The battle, despite the victory of the Poles and the complete defeat of the 13DPZmot, was finally surrendered due to the lack of ammunition and dressings.