WWII -— 80% of German military losses took place on the Eastern front, vs the Soviets. 80% is just huge. The war was over in early 1942 when the German army surrendered at Stalingrad. The rest was mopping up.
The German soldiers would have been just as dead if they had fought to their last breath in Stalingrad,rather than being executed after surrender.
Hitler was a lousy military strategist.