War. The regiment returned to Marine Corps Base Camp Pendleton and was deactivated on October 1, 1949. Korean War The Korean War prompted an expansion of the Marine Corps. As a result, the regiment was brought back into existence on 4 August 1950. On 15 September, the 1st Marine Division, including the 1st Marines, assaulted the beaches of Inchon. The regiment then went on to take part in the liberation of Seoul and later in the Chosin Reservoir Campaign. For the next two and one-half years, the 1st Marines continued to engage the North Koreans and Chinese Communists. Following the termination of hostilities in July 1953, the Regiment remained in Korea and acted as a defensive force against possible Communist attempts to rekindle the war. The 1st Marines returned to Camp Pendleton in April 1955. There it stayed for the following ten years, except for a brief deployment to Guantanamo Bay, Cuba and the Caribbean during the 1962 Cuban Missile Crisis. Vietnam War With the intensification of the American involvement in the war in Vietnam in 1965, the 1st Marine Regiment was quickly deployed to the region. By January 1966, the entire regiment had completed its move to Vietnam. The first major operation in the war for a battalion of the 1st Marines was Operation Harvest Moon in December 1965. By fall of 1967, the 1st Marines were operating permanently in the northern sector of the I Corps tactical zone. The following winter the communists launched their all-out Tet Offensive. The enemy overran Hue, the old imperial capital. Between 31 January and 2 March 1968, elements of the 1st Marines, commanded by Col. Stanley Hughes, along with other U.S. Marine and South Vietnamese units, fought to regain control of the city. Bitter street fighting and hand-to-hand combat characterized the battle. Hue was finally recaptured after the enemy suffered nearly 1,900 killed. The regiment remained deployed in South Vietnam for the next two and a half years, participating in numerous operations, both large and small. On 28 June 1971, the last members of the regiment departed Da Nang to return to the United States at MCB Camp Pendleton. The 1st Marines were the last marine infantry unit to depart Vietnam. Post Vietnam era In the spring of 1975, the 1st Marines provided primary support to the Marine Corps Base at Camp Pendleton for preparation of a camp to house Vietnamese refugees