Korean War Poster featuring an image of USS Sicily (CVE-118) launching a U.S. Marine Corps HRS-1 helicopters during Operation Marlex-5 off the west coast of Korea in the Inchon area. This was the first time that Marine Corps landing forces had moved from ship to shore by helicopter. Photo is dated 1 September 1952. Nearest HRS-1 is Bureau # 127798. It wears the markings of squadron HMR-161. Official U.S. Navy Photograph, now in the collections of the National Archives..
The Korean War, 25 June 1950 – 27 July 1953) began when North Korea invaded South Korea. The United Nations, with the United States as the principal force, came to the aid of South Korea. China came to the aid of North Korea, and the Soviet Union gave some assistance.