The is composed of Department of Defense policies, plans, procedures, assets, and resources that ensures continuity of its component mission-essential functions under all circumstances, including crisis, attack, recovery, and reconstitution. National Military Command system Joint Force Commander's Communication tool Defense Continuity program Nuclear Command and Control system

The persian wars started when emperor darius i began an invasion of greece. what caused darius to decide to attack greece? a. greek pirates had raided persia's merchant ships and coastal towns. b. greek armies had attacked and taken over land that belonged to persia. c. greek city-states had supported rebellions in the persian empire. d. greek leaders had declared independence from the persian empire.