On June 22, 1941, Adolf Hitler launched the greatest land assault in history on the Soviet Union, an attack the Führer deemed crucial to ensure Germany's economic and political survival. Operation Barbarossa, as the assault was known, was Hitler's attempt to annihilate the Soviet Union in order to fulfill the Nazi desire for Lebensraum (living space) and to finally resolve the "Jewish question." What resulted was a devastating and barbaric campaign...