Korean War: Forty-two American prisoners of war were massacred by the Korean People's Army on a hill above Waegwan, South Korea.

The Korean War was an armed conflict on the Korean Peninsula fought between North Korea and South Korea and their allies. North Korea was supported by China and the Soviet Union, while South Korea was supported by the United Nations Command (UNC) led by the United States. The conflict was one of the first major proxy wars of the Cold War. Fighting ended in 1953 with an armistice but no peace treaty, leading to the ongoing Korean conflict.

A prisoner of war (POW) is a person held captive by a belligerent power during or immediately after an armed conflict. The earliest recorded usage of the phrase "prisoner of war" dates back to 1610.

The Hill 303 massacre was a war crime that took place during the opening days of the Korean War on August 17, 1950, on a hill above Waegwan, Republic of Korea. Forty-one United States Army (US) prisoners of war were murdered by troops of the North Korean People's Army (KPA) during one of the engagements of the Battle of Pusan Perimeter.

The Korean People's Army encompasses the combined military forces of North Korea and the armed wing of the Workers' Party of Korea (WPK). The KPA consists of five branches: the Ground Force, the Naval Force, the Air Force, the Strategic Force, and the Special Operations Forces. It is commanded by the WPK Central Military Commission, which is chaired by the WPK general secretary, and the president of the State Affairs; both posts are currently headed by Kim Jong Un.

Waegwan (Korean: 왜관) is the seat of government for Chilgok County, North Gyeongsang province, South Korea. It consists primarily of the administrative district of Waegwan-eup. It is situated on both sides of the Nakdong River, which is traversed by railroad, automobile and pedestrian bridges.