Final answer:
TC 3-21.5 is the training circular that provides guidelines for drill and ceremonies in the U.S. Army, including procedures for troops in formation and individual soldiers.
Step-by-step explanation:
The training circular that covers drill and ceremonies in the United States Army is TC 3-21.5. This manual provides the necessary guidelines for the conduct of drills and ceremonies across the Army. It outlines the movements and procedures for troops in formation and individual soldiers, and it is an essential resource for JROTC, ROTC, and active duty personnel wanting to master the art of military drills and protocol.