"The German-soviet Invasion of Poland, 1939" Death and destruction by the roadside at Kock, where the last battle of the Polish campaign between Polish Independent Operational Group 'Polesie' commanded by General Franciszek Kleeberg and German XIV Motorised Corps led by General Gustav von Wietersheim, took place. Between 29 and 30 September this particular Polish unit was also engaged in victorious battles against Red Army at villages of Milanów and Jabłoń.