The Battle of Heartbreak Ridge, also known as the Battle of Wendengli, was a month-long battle in the Korean War which took place between 13 September and 15 October 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, these defenses were even more formidable than on Bloody Ridge.