The Battle of Heartbreak Ridge (Korean: 단장의 능선 전투; Hanja: 斷腸의 稜線 戰鬪; French: Bataille de Crèvecœur), also known as the Battle of Wendengli (Chinese: 文登里战斗; pinyin: Wéndēnglǐ Zhàndòu), was a month-long battle in the Korean War which took place between September 13th and October 15th, 1951. After withdrawing from Bloody Ridge, the Korean People's Army (KPA) set up new positions just 1,500 yards (1,400 m) away on a 7-mile (11 km) long hill mass. If anything, the defenses were even more formidable here than on Bloody Ridge.

The Battle of Heartbreak Ridge was one of several major engagements in the hills of North Korea a few miles north of the 38th Parallel (the pre-war boundary between North and South Korea), near Chorwon. For the Chinese, this battle is often confused with the Battle of Triangle Hill, which occurred a year later.