would Hitler still be defeated if the U.S and Britain made peace with Germany? did the allied powers really help that much.
These previously asked questions are relevant here:
How true is the statement that the Soviet Union won the World War II in Europe?
How important was lend-lease to the the Soviet war effort in WW2?
I also guess it's important to say that the "Allied Powers" of WW2 include the Soviet Union, whatever might have happened afterwards.