US decided only to commit to D-day when the soviets were gaining ground on the Germans. In fact by the time they made the decision to do that, the soviets had a

US decided only to commit to D-day when the soviets were gaining ground on the Germans. In fact by the time they made the decision to do that, the soviets had already liberated half of ukraine. 4 months after the decision, the soviets had liberated the whole of ukraine. The soviets war machine steamrolled the rest of Germany and only US forces would be able to stop them from occupying the whole of europe.