In August 1950, 1st CSG was deployed to Kobe, Japan; and was subsequently deployed in September 1950 to Inchon, Korea, assigned to the 1st Marine Division. They participated in the Korean War, fighting at Inchon-Seoul, Chosin Reservoir, the East-Central front, and the Western front. In August 1951, they were reassigned to the Fleet Marine Force; and in October 1951, reassigned to the 1st Marine Division. In May 1953, they were again reassigned to Fleet Marine Force and relocated to MCB Camp Pendleton, California.