Corps are tailored for the theater and mission for which they are deployed. Once tailored, however, they contain all the combat, combat support, and combat service support capabilities required to sustain operations for a considerable period. Corps are commanded by Lieutenant Generals.
Corps plan and conduct major operations and battles.
They synchronize tactical activities including the maneuver of their divisions, the fires of their artillery units and supporting aerial forces, and the actions of their combat support and combat service support units. While corps normally fight a part of a larger force, they may also be employed alone, either as an independent ground force or as the Army or land component of a joint task force. When employed alone, they may exercise operational as well as tactical responsibilities. Corps may be assigned divisions of any type required by the theater and the mission. Armored cavalry regiments, field artillery brigades, engineer brigades, air defense artillery brigades, and aviation brigades are the non-divisional units commonly available to the corps to weight its main effort and to perform special combat functions.