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Supreme Allied commander and Operation Overlord
In December 1943, President Roosevelt decided that Eisenhower – not Marshall – would be Supreme Allied Commander in Europe. The following month, he resumed command of ETOUSA and the following month was officially designated as the Supreme Allied Commander of the Allied Expeditionary Force (SHAEF), serving in a dual role until the end of hostilities in Europe in May 1945.[88] He was charged in these positions with planning and carrying out the Allied assault on the coast of Normandy in June 1944 under the code name Operation Overlord, the liberation of Western Europe and the invasion of Germany.

Eisenhower speaks with men of the 502nd Parachute Infantry Regiment (PIR), part of the 101st "Screaming Eagles" Airborne Division, on June 5, 1944, the day before the D-Day invasion. The officer Eisenhower is speaking to is First Lieutenant Wallace Strobel.
Eisenhower, as well as the officers and troops under him, had learned valuable lessons in their previous operations, and their skills had all strengthened in preparation for the next most difficult campaign against the Germans—a beach landing assault. 