Germany would have lost to Russia, they were already being beaten back when D-day happened. Europe would have become a communist dictatorship, not a german one.
"I want to tell you what, from the Russian point of view, the president and the United States have done for victory in this war," Stalin said. "The most important things in this war are the machines.... The United States is a country of machines. Without the machines we received through Lend-Lease, we would have lost the war." - Stalin
