The SEAC is appointed to serve as an advisor to the Chairman and the Security of Defense on
all matters involving Total Force integration, utilization, health of the force, and joint
development for enlisted personnel.
The SEAC also serves as a spokesperson to leaders and organizations on applicable issues
affecting enlisted forces.
Joint Chiefs of Staff Subject to the authority, direction, and control of the U.S. President and
the Secretary of Defense, members of the Joint Chiefs of Staff serve as advisors to the
President, Secretary of Defense, and the National Security Council.
The Joint Chiefs provide the strategic direction of the U.S. Armed Forces and review major
materiel and personnel requirements according to strategic and logistic requirements and
establish joint doctrine.
Members of the Joint Chiefs of Staff are also responsible for the assignment of logistic
responsibilities to the military services, formulation of policies for joint training, and
coordination of military education.
Members of the Joint Chiefs of Staff are the Chairman; Vice Chairman; Chief of Staff of the
U.S. Army; Chief of Naval operations; Chief of staff of the USAF; Chief of Space Operations;
Commandant of the Marine Corps; and Chief of the National Guard Bureau.
, For the Service Chiefs ( Chief of Staff of the Army , Chief of Naval Operations , Chief of Staff of
the USAF , Commandant of the Marine Corps ) , their Joint Chiefs of Staff duties take
precedence over all other duties.
Consequently, as the military heads of their respective services, the Joint Chiefs delegate
many duties to their Vice Chiefs while retaining overall responsibility.
Since this nation's birth, our military has had the constitutional duty to ensure national
survival, defend lives and property, and promote vital interests at home and abroad.
Jointly, senior military leaders underwrite the strategy of defending the homeland and
assuring allies, while dissuading, deterring, and defeating enemies.
The military departments consist of the Army, Navy (including the Marine Corps and in
wartime, the Coast Guard), and the USAF (including the Space Force).
The Secretary of Defense and the Joint Chiefs of Staff established the general and specific
functions (roles and missions) of each branch of the U.S. Armed Forces in the Key West
Agreement of 1948.
The latest revision of the Key West Agreement in 1958 states 3 general functions of the U.S.
Armed Forces. 1. Support and defend the U.S. Constitution against all enemies, foreign and
domestic.