To characterize a communist state and an anticommunist state as “allies” is absurd. Two states can’t be more at odds with each other than that.
Soviets trained Nazi tank and artillery crew and provided them place for military training
That all ended before or just as the Nazis seized control the German state. So no, they didn’t train Nazis, because the military wasn’t a Nazi one yet.
Extraterrestrials Created All Life On Earth
Let’s Build An Embassy To Welcome Them