Unified Command Plan
https://www.defense.gov/About/Military-Departments/Unified-Combatant-Commands/
U.S. Northern Command
https://www.northcom.mil
Combatant commanders
Each CCMD is headed by a four-star general or admiral recommended by the Secretary of Defense, nominated for appointment by the President of the United States, confirmed by the Senate and commissioned, at the President's order, by the Secretary of Defense.