On June 6, 1944, during Operation Overlord, Allied forces conducted the largest amphibious assault in history by landing troops on the beaches of Normandy. This marked the commencement of the eastward advance aimed at defeating Germany. Strategically, the successful Allied landing in France dealt a significant psychological blow to the German occupation of Europe.
The D-day operation united the land, air, and sea forces of the Allied armies . Moreover, it earned the code-name of OVERLORD, the operation deploying five naval assault divisions to the shores of Normandy, France.
This operation brought something to attention, which is German Army's ability to control western Europe.