Which group exercises ADCON through their respective Service Chiefs?

The group that exercises Administrative Control (ADCON) through their respective Service Chiefs is the Secretaries of the Military Departments. ADCON primarily pertains to the management and support functions necessary for the operation of military forces, including personnel management, logistics, and resource allocation. The Secretaries of the Military Departments are responsible for overseeing their respective branches of the military and report directly to the Secretary of Defense. Each Service Chief operates under the authority of their respective Secretary, ensuring that the forces are organized, trained, and equipped according to the needs of the Department of Defense.

This structure is foundational for managing the administrative aspects of military operations and ensuring that each service aligns with national defense strategies. Unified Combatant Commands, Joint Chiefs of Staff, and Combatant Commanders play crucial roles in operational command and strategic planning, but they don't directly handle administrative control in the same way as the Secretaries of the Military Departments.