Task Force Faith and Korean War, have which country as the principal force?
Task Force Faith: Task Force Faith, also known as Task Force Maclean (and by its official designation, Regimental Combat Team 31 (RCT-31)) or the Polar Bear Regiment (), was a United States Army unit destroyed in fighting at the Battle of Chosin Reservoir during the Korean War between 27 November – 2 December 1950. Korean War:  The war began on 25 June 1950 when North Korea invaded South Korea.
United States