The Warsaw Uprising (1 August - 3 October 1944).
Rebels on the barricades
In the Warsaw Uprising, citizens of Warsaw revolted against the German occupation when the Russian Red army approached the city in August 1944. The Russians however, did not support the rebels and the uprising failed, after which the city was destroyed by the German army. Many Poles were killed or exiled.
In the background of the image, you can see Syrena, the coat of arms of Warsaw.
Find other Polish stamps commemorating the Warsaw Uprising of 1944.
Find other Polish stamps depicting Syrena
World War II
Warsaw Uprising (Wikipedia)
Warsaw uprising (Info Poland - Buffalo University)
FDC Fischer U 338