Why did the United States and the USSR fight together as allies in 1941?

and Did the United States and the USSR ever fully trust one another? Explain plz

Because Hitler went back on his word, and I would assume not.

Explanation:

Hitler attacked Russia forcing Russia to enter WWII against them. This put the US and USSR on the same side. I don't think they fully trusted each other past temporary allies because of the vastly different ideologies they had. They were polar opposites.

true

explanation:

i think the answer is: cuba wanted to be independent from spain, and the u.s. wanted to end spanish rule in the west.

hope i

-lavira : )