Warsaw Uprising
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During the Second World War in 1944, an armed uprising by the resistance occurred in Nazi-occupied Warsaw, incited by the Polish government-in-exile.
The resistance was supported by the Soviet military, but its advance was halted. The German military completely crushed Warsaw, and it is believed that approximately 220,000 citizens and members of the resistance were massacred.
The survivors of the massacre escaped into underground waterworks and continued their resistance and assassination efforts.