Command is the authority and responsibility to make decisions and direct action under uncertainty. In military organizations, command binds collective violence to a coherent purpose: it establishes who decides, how decisions propagate, and how initiative is constrained.

Command is not the same as control. Command is a relationship (authority + responsibility). Control is the set of mechanisms that translate decisions into coordinated action. The distinction matters because organizations can centralize command while decentralizing control, or decentralize command while maintaining tight control through doctrine and reporting.