Barbarossa Operation

What happened

Operation Barbarossa (June 22, 1941) was Nazi Germany's invasion of Soviet Union—the largest military invasion in history by some measures. 3+ million German and allied troops attacked across a 1,000-mile front. Initial German victories were spectacular: encircled Soviet armies, pushed deep into Soviet territory. Leningrad was besieged (900-day siege); Moscow was nearly taken. However, Soviet resources, winter, and partisan warfare wore down Germany. Soviets eventually counterattacked at Stalingrad and Kursk. By 1943, Germany faced slow retreat. Barbarossa lasted 1,400 days (June 1941-May 1945). Deaths were enormous: 27+ million Soviets (soldiers and civilians); 4+ million Germans; millions more from famine and atrocities.

Why it mattered

Barbarossa was Nazi Germany's strategic miscalculation. Hitler believed Germany could defeat Soviet Union in one season; instead, the war lasted four years and bled Germany dry. The war on Eastern Front determined WWII's outcome—Soviet sacrifices and eventual victory were crucial to Germany's defeat. The invasion unleashed Nazi genocide: Einsatzgruppen killed 1-1.5 million Jews in mobile killing squads; German occupation starved millions. The war brutalized both Germans and Soviets; millions of civilians died. Soviet victory at enormous cost shaped Soviet identity and justified Soviet domination of Eastern Europe. The Eastern Front's devastation demonstrated total war's extreme brutality and set the template for 20th-century totalitarian warfare.