On June 2, 1943, a day after graduating high school and a week after his 18th birthday, Moore was
drafted into the United States military. Although he expressed interest in joining the
Navy as Eubanks, Owens, and Moore's brother Charles were also in the branch, he did not have a college education (which was required for those entering the Navy) and a naval officer attempted to place him in the
Marine Corps. Unhappy with this, Moore instead joined the Army. After training at
Camp Van Dorn in Mississippi, he went to New Jersey's
Fort Dix, where he was assigned to the
90th Infantry Division, D Company, 359th Infantry Regiment, 1st Battalion, 1st Platoon as a machine gunner. As a member of the 1st Platoon, Moore's machine gun was
.30 caliber water-cooled, described as a heavy weapon. Moore and his group were not expecting to participate in the
Normandy landings in 1944. In March, they were told they would be involved in an amphibious assault off the English coast, with plans of a
dry run upon completing training in
Knighton, Powys. The group landed in
Liverpool before going to an army camp in
Wales, South Yorkshire. On June 4, two days before the landings, Moore observed a map produced by officers and realized the land depicted was not England, but France, and that he would be involved in the invasion of Normandy. The regiment was reattached to the
4th Infantry Division for the operation. On June 6, Moore's division landed on
Utah Beach, where they faced German resistance and other obstacles; at one point, as he waded through the water, Moore stepped in a shell hole and fell in, causing him to go underwater before recovering. Upon reaching land, he hid behind a sand dune before continuing. By nightfall, the division had reached half a mile inland and started settling into foxholes when the
82nd and
101st Airborne Divisions arrived to divert German attention. There was also discussion among Moore's division about General
Dwight D. Eisenhower recalling them due to the lack of progress made at nearby
Omaha Beach, though they stayed at Utah. After clearing the beach, Moore joined General
George S. Patton at
Périers, Manche. At the city, Moore witnessed American airplanes dropping bombs along a ten-mile strip near the city, an event nicknamed "The Big Push". doing so aboard the
USS Excelsior; the ship was named after the
Excelsior Mills in
Union, South Carolina, near Moore's hometown of Spartanburg. He was formally discharged on November 15, 1945. Despite his honors, Moore distanced himself from his allies. He received the information of his company members but did not contact them out of worry that doing so would lead to him finding out they were
killed in action. He also turned down offers to return to the beaches of Europe, saying he "left too many friends over there." In 1994, the 50th anniversary of the Normandy landings, Moore was invited by
Unocal Corporation to follow his route during the war from Utah Beach to Czechoslovakia. He declined the offer, stating he "would have gone, but when racing is your livelihood and there's a race on the schedule for a certain weekend, you about have to be there." ==NASCAR==