Korean War: American troops withdrew from Cheonan, in modern-day South Korea, after suffering heavy casualties from a North Korean attack.

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.

Cheonan is the largest and most densely populated city of South Chungcheong Province, South Korea, and the third largest city in the Hoseo region after Daejeon and Cheongju. Cheonan borders Gyeonggi Province in the north, North Chungcheong Province to the east and southeast, Sejong to the south and Asan and Gongju to the west and southwest.

The Battle of Chonan was the third engagement between United States and North Korean forces during the Korean War. It occurred on the night of July 7/8, 1950, in the town of Chonan in western South Korea. The fight ended in a North Korean victory after intense fighting around the town, which occurred throughout the night and into the morning.