Who won WWII ?
I always thought that the Allies did. Now I'm not too sure.
The soviet army did their share in the battle. They regained more ground than the Allied did in the West. And they did it alone. No direct help from the free world.
Have a look at this series of documentaries. It was made by the russians for the russian tv. It gives another perspective from what we usually receive as information on our part of the world.
Not that I support communism or the soviets. Far from it. But when I see facts, I see facts. Have a look for yourself. And it gives a lot of strategy insight.