If you average 11,000,000 military deaths over 47 months of combat, this is what the Soviet Union lost every two months.
One of the images that has stayed with me is the smiling, jovial German ski trooper high in the Caucasus Mountains, certain of German victory and oblivious to the Stalingrad disaster that was in his near future. It has been a long and bloody trail from there to Kustrin. No more smiles.