The 1939 Battle of Warsaw was fought between the Polish Warsaw Army (Armia Warszawa) garrisoned and entrenched in the capital of Poland (Warsaw) and the German Army. It started with huge aerial bombardments by the Luftwaffe starting on September 1, 1939.

Land fighting started on September 8, when the first German armoured units reached the Wola area and south-western suburbs of the city. Despite German radio broadcasts claiming to have captured Warsaw, the attack was stopped and soon afterwards Warsaw was under siege. The siege lasted until September 28, when the Polish garrison under Gen. Walerian Czuma capitulated. The following day approximately 100 000 Polish soldiers left the city and were taken POW. On October 1 the Wehrmacht entered Warsaw, which started a period of German occupation that lasted until the Warsaw Uprising and later until January 17, 1945.