part of the PVA 9th Army was rendered ineffective as they suffered an estimated 37,500 casualties trying to stop the Marines' march out of the "Frozen Chosin". The division was evacuated from Hungnam in mid-December and then landed in Pusan. Beginning in early 1951 the division participated in several UN offensives in east-central Korea. This was followed by defending against the Chinese Spring Offensive. By June 1951 the 1st Marine Division had pushed northward and secured the Punchbowl and then settled into a defensive line long. In mid-March 1952 the 8th Army, to whom the Marines were attached, instituted Operation Bootdrop. The operation was a massive redeployment of UN forces designed to put more Republic of Korea Army units on the Jamestown Line, the UN's Main line of resistance (MLR). The 1st Marine Division was reassigned to the far western end of the MLR defending a line that encompassed the Pyongyang to Seoul corridor. For much of the next year, in what would be termed the "Outpost War", action along this line consisted of small, localized actions because much of the fighting revolved around the holding and retaking of various combat outposts along the MLR, including the Battles of Bunker Hill, First Hook and Outpost Vegas. Fighting continued until the Armistice took effect on 27 July 1953. During the Korean War the division suffered combat casualties of 4,004 dead and 25,864 wounded. In 1953 the division command post was established at Tonggu. The site was later named Camp Howze by the US Army. A memorial to—US and ROK—Marine participation in the war is located at the adjoining district of Bongilcheon-ri (봉일천리) (). Vietnam War In August 1965, the division's 7th Marine Regiment participated in Operation Starlite, the first major engagement against the Vietcong (VC) for American ground troops in South Vietnam. This was followed in September by Operation Piranha. In December Division elements conducted Operation Harvest Moon. In March 1966 division elements conducted Operations Utah, Oregon and Texas. March also saw the 1st Marine Division Headquarters established at Chu Lai. By June, the entire division was in South Vietnam, its Tactical Area of Responsibility (TAOR) was the southern two provinces of I Corps — Quang Tin and Quang Ngai. In August the division conducted Operation Colorado. Between March and October 1966 to May 1967, the division conducted 44 named operations. The division received its 7th Presidential Unit Citation for service