From June 1952- March 1953 there was the Battle of Old Baldy that the UN won in 52 but after intense artillery and mortar fire, China seized the crest and kept it even after air strikes.
They occurred over a period of 10 months in 19521953, though there was also vicious fighting both before and after these engagements. UN victory in 1952 action
Chinese victory in 1953 action Chinese artillery and mortar fire became very intense; then the Chinese infantry followed up swiftly and seized the crest. Counterattacks by the 23d Regiment supported by air strikes and artillery and mortar fire, did not succeed in driving the Chinese from the newly won positions. 
