On August 25 ,1941, Cole enlisted in the Marine Corps for the duration of the National Emergency, and following a boot training at Parris Island, South Carolina, he was appointed to the Field Music School for training as a Marine Corps Field Music, the equivalent of a bugler. Completing instruction, he was transferred to the First Marine Regiment, First Marine Division, and on August 7, 1942, reached the shores of Guadalcanal for the first American offensive of World War II.
Not too happy in his role of field music when he had joined a fighting outfit to fight and after acquitting himself meritoriously as a machine gunner in the absence of the regular gunner, he applied for a change in rating, but was refused due to the shortage of buglers. Cole completed his first overseas tour of duty and returned to the United States in February 1943, where he joined First Battalion, Twenty-Third Marines, then forming as a part of the Fourth Marine Division at Camp Lejune, North Carolina. When the unit moved to California, he again asked for relief as a Field Music and for permission to perform line duties, but was again refused due to the shortage of buglers in the Marine Corps.
During the first engagement of the Fourth Division at Roi-Namur in the Kwajalein Atoll, Cole, again forsaking his bugle, went into action as a machine-gunner. Four months later, when the Division stormed ashore at Saipan, he had been assigned to a machine-gun unit. Because of his proven ability in combat, he was designated a machine gun section leader. During the battle when his squad leader was killed, Cole, although wounded, assumed command of the entire squad and acquitted himself in such a manner to be awarded the Bronze Star Medal for "...his resolute leadership, indomitable fighting spirit and tenacious determination in the face of terrific opposition...". He was also awarded the Purple Heart Medal for wounds received in action.
A few days after the battle of Saipan, Cole, again led his squad ashore in the invasion of the neighboring islands of Tinian, where he continued to live up to his growing reputation as "The Fighting Field Music."
After the Marianas campaigns, he again requested a change of rating and this time his request was approved and he was redesignated Corporal "line" and was subsequently promoted to Sergeant in November 1944.
On February 19, 1945, Sergeant Cole led his machine gun section ashore in the D-Day assault of Iwo Jima. Moving forward with the initial assault wave, their advance was halted by a hail of fire from two Japanese emplacements which Sergeant Cole personally destroyed with hand grenades. His unit continued to advance until pinned down for a second time by enemy fire from three Japanese gun emplacements. One of these emplacements was silenced by Cole's machine guns, but then jammed. Armed only with a pistol and one hand grenade, Sergeant Cole made a one-man attack against the two remaining positions. Twice he returned to his own lines for additional grenades and continued the attack under fierce enemy fire until he had succeeded in destroying the Japanese strong point. Returning to his own squad, he was instantly killed by an enemy grenade. By his one-man attack and heroic self-sacrifice, Sergeant Cole enabled his company to move forward against fortifications and attain their ultimate objective.
