Operation Barbarossa, Nazi Germany’s surprise invasion of the Soviet Union, launches on June 22, 1941. In the largest military operation in history, Adolf Hitler aims to seize the Soviet Union’s vast economic resources, enslave its populations, and expand Germany eastward. What follows is a brutal and catastrophic campaign fought across enormous frontlines, changing the course of World War II forever. As millions of soldiers clash in one of history’s deadliest conflicts, the invasion of the Soviet Union becomes a turning point that will ultimately help decide the war in Europe.