2-51. Each Component of the Army (Regular Army, Army Reserve, and Army National Guard) has different capabilities, requirements, and restrictions for supporting civil authorities. Regular Army forces and activated Army Reserve units always conduct DSCA missions under the command of the President, exercised through the Secretary of Defense and the combatant commanders. The Army National Guard and Air National Guard are state forces. Army National Guard and Air National Guard units conduct DSCA missions or National Guard civil support missions under the command of their governors. If placed in federal service, under Title 10, USC, National Guard units become federal military forces. Operations of various military units can be in support of different agencies, within overlapping operational areas, and under different chains of command. Military support for a large incident response can include simultaneous operations of—