This United States Army manual, Training Circular TC 6-0 Training the Command and Control Warfighting Function March 2021, is the introductory guide for commanders at battalion through corps echelons to use to incorporate command and control training during unit training management. This publication provides the background information for commanders, leaders, Soldiers, Service Members, and Civilians who plan, prepare, execute, and serves as the Command and Control Warfighting Function Training Strategy, superseding the Mission Command Training Strategy 2013-2019. TC 6-0 includes several training audiences: commanders at battalion echelon and above, and their chiefs of staff, deputy commanding officers, executive officers, and operations officers (S-3 or G-3). It applies to the commanders of all unit types - maneuver, functional, and multi-functional. TC 6-0 applies to the Active Army, Army National Guard/Army National Guard of the United States, and United States Army Reserve unless otherwise stated. Units should use the TC and command and control collective tasks discussed herein.