But I'm thinking 1945 not later. At the height of the war, the Germans had about 60 divisions fighting against the western Allies in Norway, Italy, and France. In the East against the Russians the Germans had some 200 divisions, and many of these were crack SS and Panzer divisions. That alone says that at the time, in Europe, the Russians had a huge superiority in ground forces.

As well, the Russian were willing to accept horrible losses in combat where the US and British forces were both less willing and able to do so. Think about it, there were several battles in the East where the Soviets suffered more casualties in men lost, than than there were participants on both sides of the DDay invasion!