The German Way of War - Operation Barbarossa

"The German invasion of the Soviet Union began on June 22, 1941. It involved three million men: 152 divisions in three army groups, 3,350 tanks, 2,000 airplanes, 7,000 pieces of artillery, 600,000 motorized vehicles, and 625,000 horses. The initial efforts matched such numbers. In three weeks, Army GroupCentre advanced 400 miles and captured the whole of Belorussia. Russian armies lost nearly 5,000 tanks, nearly 10,000 artillery pieces, and 1,700 planes."

"The German army left 4 million men on the battlefields of Eastern Europe, but they killed 27 million. The Red Army lost 11.5 million soldiers, and 15.5 million civilians died"

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fig.1 - Operação Barbarossa, a maior operação militar da história.