Why did the allies help the Soviets fight against the Germans in spite of the Nazi-Soviet Pact?

Pulled the trigger: Lee Oswald. Behind the plan: Lee Oswald. You've been watching too many wacko movies.

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.