unified combatant command

A Unified Combatant Command (COCOM) is a United States joint military command composed of forces from two or more services, has a broad and continuing mission, and is organized either on a geographical basis (known as "Area Of Responsibility", AOR) or on a functional basis. All COCOMs are commanded by either a four star general or admiral and are considered "joint" commands with specific badges denoting their affiliation. COCOMs are led by Combatant Commanders, formerly known as a regional "Commander-in Chief" (CINC; pronounced "Sink").
See more at Wikipedia.org...