Following the outbreak of Korean War in June 1950, the Fifth Marines sailed within 1st Provisional Marine Brigade to that country in order to reinforce allied ROK Army. Fegan arrived with the regiment to Korea at the beginning of August and took part in the defense of Pusan Perimeter. During the fighting near Chindong-ni on August 8, 1950, Fegan was assigned the mission of seizing a well organized enemy position, strongly manned with automatic weapons.