What was the significance of the d-day invasion? a. it gave the allied forces control over italy b. brought the united states into world war ii. c. gave the allied forces entry into france. d. it allowed american bombers to reach japan.

The D-day invasion, or the re-invasion of Europe by the Allied forces through the beaches of Normandy, France, were significant because it gave the allied forces entry into France. The Allied Forces were driven from France fairly early on in the war by a powerful German offensive. The Allies needed to reenter Western Europe in order to mount a campaign to Germany. It was a costly invasion in which thousands of lives were lost, but it was a crucial turning point in the war, and marked the beginning of the end of the Nazi regime.