How many us divisions took part in the invasion of Normandy?

During the invasion of Normandy, known as D-Day, which took place on June 6, 1944, a total of 5 U.S. divisions participated. These were the 1st Infantry Division, 4th Infantry Division, 29th Infantry Division, 82nd Airborne Division, and the 101st Airborne Division. They played key roles in the amphibious assaults on the beaches and in securing critical areas inland.