World War II: The Warsaw Uprising against the Nazi German occupation breaks out in Warsaw, Poland.

The Warsaw Uprising, sometimes referred to as the August Uprising, or the Battle of Warsaw, was a major World War II operation by the Polish underground resistance to liberate Warsaw from German occupation. It occurred in the summer of 1944, and it was led by the Polish resistance Home Army. The uprising was timed to coincide with the retreat of the German forces from Poland ahead of the Soviet advance. While approaching the eastern suburbs of the city, the Red Army halted combat operations, enabling the Germans to regroup and defeat the Polish resistance and to destroy the city in retaliation. The Uprising was fought for 63 days with little outside support. It was the single largest military effort taken by any European resistance movement during World War II. The defeat of the uprising and suppression of the Home Army enabled the pro-Soviet Polish administration, instead of the Polish government-in-exile based in London, to take control of Poland afterwards. Poland remained part of the Soviet-aligned Eastern Bloc throughout the Cold War until 1989.