This United States Army manual, Army Techniques Publication ATP 3-93 Theater Army Operations August 2021, discusses the organization and operations of the theater army headquarters, including its role as the Army Service component command (ASCC) to the combatant commander and the relationships among the theater army headquarters, the theater enabling commands, and any other forces potentially provided by the Army Service. This publication also discusses theater army Service responsibilities (Title 10, U.S. Code [USC], Section 7013b functions and responsibilities), combatant commander’s daily operational requirements, theater army responsibilities for setting, supporting, and maintaining the theater and joint operations areas, and the operational employment of the theater army and its contingency command post (CCP).

This publication is most applicable to theater army commanders and staff. It provides relevant information regarding the theater army organization and operations for commanders and staffs at subordinate, theater-level commands and brigades, combatant commanders, and other Service headquarters. The organizational figures and associated staffing levels are derived from an amalgamation of theater army modified tables of organization and equipment and may vary to some degree from modified tables of organization and equipment for each theater army.

The principal audience for ATP 3-93 is commanders and staffs of theater armies and transregional ASCCs; however, members of the profession of arms serving at the combatant command level or within an Army headquarters performing a joint role or similar scenario will greatly benefit from understanding the theater army and its responsibilities. Commanders and staffs of Army headquarters serving as joint task force (JTF) or multinational headquarters should also refer to applicable joint or multinational doctrine concerning the range of military operations and joint or multinational forces. Trainers and educators throughout the Army will also use this publication.