This publication reorganizes Army head quarters to more effectively support a leaner, more agile modular force. It distinguishes the differences in scope and responsibility of organizations. It recognizes the Armywide role and multidiscipline functions of the Army Commands; the Theater Army as an Army Service Component Command reporting directly to Department of the Army and serving as the Army’s single point of contact for combatant commands; and the Direct Reporting Units as providing broad, general support to the Army in a normally single, unique discipline not otherwise available elsewhere in the Army. It identifies each organization’s missions, functions, and command and staff relationships with higher and collateral headquarters and agencies.