The principal battles of the stalemate include the Battle of Bloody Ridge ( 18 August–15 September 1951 ) , the Battle of the Punchbowl ( 31 August-21 September 1951 ) , the Battle of Heartbreak Ridge ( 13 September–15 October 1951 ) , the Battle of Old Baldy ( 26 June–4 August 1952 ) , the Battle of White Horse ( 6–15 October 1952 ) , the Battle of Triangle Hill ( 14 October–25 November 1952 ) , the Battle of Hill Eerie ( 21 March–21 June 1952 ) , the sieges of Outpost Harry ( 10–18 June 1953 ) , the Battle of the Hook ( 28–29 May 1953 ) , the Battle of Pork Chop Hill ( 23 March–16 July 1953 ) and the Battle of Kumsong ( 13–27 July 1953 ) .
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