Question: Task Force Faith and Operation Undertone were both components of which branch of the U.S. military?
Sentence (from "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.
Relevant evidence: Yes