Because of the Hitler-Stalin Pact many in America considered Russia our enemy, but when Hitler turned on Stalin, America jumped in to help. The "Murmansk Run" up through the Arctic was the lifeline that brought supplies to the beseiged Soviets. One convoy, PQ17 lost 22 out of 33 ships to Norway-based German bombers
But after VE Day, Russia held back and only declared war on Japan a very short time before VJ Day.

troll