The Battle of Triangle Hill
North of Gimhwa-eup, Chorwon County, North Korea
The Battle of Triangle Hill, also known as Operation Showdown or the Shangganling Campaign, was a protracted military engagement during the Korean War. The main combatants were two United Nations (UN) infantry divisions, with additional support from the United States Air Force, against elements of the Chinese People's Volunteer Army (PVA) 15th and 12th Corps. The battle was part of UN attempts to gain control of "The Iron Triangle", and took place from 14 October to 25 November 1952.