America sent so much stuff to the allies that 2/3rds of the Red Army vehicles were US-made at the end of WW2.
I think we also shipped them machine tools to crank out equipment that we had designed, so much of the Soviet made gear was ours to a degree.
Incidentally the Soviets had a superior tank in WWII because they used a suspension designed by an American engineer. That engineer tried to sell it to the American military but was turned down.