- German troops capture Belgrade, Yugoslavia.
- On April 13, 1945, Adolf Hitler proclaims from his underground bunker that deliverance was at hand from encroaching Russian troops and Berlin would remain German. A “mighty artillery is waiting to greet the enemy,” proclaims Der Fuhrer.
- Vienna falls to Soviet troops.
- The Soviet Union accepted responsibility for the World War II murders of thousands of imprisoned Polish officers in the Katyn Forest. The Soviets had previously blamed the massacre on Nazi Germany.