Question

Why was the D-Day invasion crucial for the Allies’ Europe First strategy?

Answer 1

The invasion was key in forcing the Germans to retreat east.

On June 6, 1944, a battle known as D-Day kicked off. Some 156,000 American, British and Canadian forces landed on five beaches along a 50-mile stretch of the heavily fortified coast of France’s Normandy region. It was the largest seaborne invasion in history. The operation began the liberation of German-occupied France (and later Europe) from Nazi control.

Answer 2

There are four reasons as to why. They are:
1. The invasion forced Germany to surrender.
2. The invasion ended German ambitions to invade the United States.
3. The invasion was key in forcing the Germans to retreat east.
and finally
4. The invasion exhausted German supplies and weakened their defenses.