Are you forgetting there was still fighting in the Pacific going on? In fact, the war officially did not end until September 2nd, 1945, when Japan officially signed the surrender documents. So, no, oneshot, Russia didn't win the war. They only knocked out the second of three major combatants. And don't you dare try and tell ME the Pacific theater of war doesn't count, because it does! Japan was ALLIED with Germany, and so long as one member of that alliance continued to fight the 2nd World War raged on.