When the Korean War's campaign began on 27 June 1950, "Piedmont" was on station in Japan carrying out his normal schedule providing tender services to ships of the U.S. 7th Fleet where she remained until relieved in November. During the Korean campaign "Piedmont" completed four tours in the Western Pacific: 4 September 1950 to 27 October 1950; 1 August 1951 to 12 February 1952; 9 September 1952 to 9 March 1953 and 11 April 1954 to 27 July 1954; when she acted as flagship for Commander United Nations Blockading and Escort Force and provided tender services to ships of Canada, Colombia, New Zealand, South Korea and Thailand as well as those of the U.S. Navy.