And that only happened because the US provided basically everything to the Soviets under Lend-Lease.
Without American equipment, the Soviets were getting absolutely slaughtered.
Their infrastructure was collapsed, they were out of equipment and couldn’t produce more. The US provided tanks, guns, bullets, clothes, food, and even railway to them to keep them afloat and hold off the Nazis while they fought the Western Front.
Without Lend-Lease, the Soviets stood exactly zero chance.