Korean War: Over fears that North Korean soldiers were infiltrating refugee columns, U.S. forces concluded a four-day massacre of hundreds of civilians through shootings and air attacks near the village of Nogeun-ri.

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.

The No Gun Ri massacre was a mass killing of South Korean refugees by U.S. military air and ground fire near the village of Nogeun-ri (노근리) in central South Korea between July 26 and 29, 1950, early in the Korean War. In 2005, a South Korean government inquest certified the names of 163 dead or missing and 55 wounded, and added that many other victims' names were not reported. The No Gun Ri Peace Foundation estimates 250–300 were killed, mostly women and children.

Nogeun-ri, also No Gun Ri, is a village in Hwanggan-myeon, Yeongdong County, North Chungcheong Province in central South Korea. The village was the closest named place to the site of the No Gun Ri Massacre during the Korean War, in which the U.S. military killed South Korean civilians fleeing their nearby villages. A South Korean government committee in 2005 certified the names of 163 dead and missing and 55 wounded, and said many other victims' names were never reported. The South Korean government-funded No Gun Ri Peace Foundation, which operates a memorial park at the massacre site, estimated in 2011 that 250–300 were killed, mostly women and children.