Omaha Beach was one of the two American beachheads in the Normandy Invasion of 6 June 1944, and the bloodiest. A number of factors went into its near failure, but high among them was the coincidence that a first-rate German unit, the 352nd Infantry Division, happened to be training in the German positions and reserve areas. The other four Allied beachhead were defended by troops of limited ability.
Attacking forces were under V Corps, with the experienced 1st Infantry Division (U.S.) and the new National Guard 29th Infantry Division as the major subunits. Several Army Ranger units were redirected there during the battle.