In the beginning of 1943, upon the creation og Kedyw, it was created the 9th company of military subversion Żniwiarz, which was a military unit at the disposal of the commander of the Sub-district II of Żoliborz (of Armia Krajowa), pseudonym Żywiciel.
About 13:50 soldiers who transported weapons from stores in Wespazjana Kochowskiego Street fired the first shots in the Warsaw Uprising.
The target of the Żniwiarz Group was German positions in Krasińskiego street and areas of Plac Grunwaldzki.
Upon arriving, the Group soldiers were attacked in the area of Plac Lelewela (Krechowiecka and Cieszkowskiego Streets) and suffered severe losses.
They took part in the attack on Warsaw Gdańsk Station, defended the Opel workshop as well as the insurgent redoubt in a building of Fire Brigades in the crossing of Słowackiego, Gdańska and Potocka streets.