U.S. Military Assistance Command, Vietnam (MACV)
was activated 8 Feb 1962, a unified command subordinate
to the Commander-in-Chief, Pacific. In May 1964 it was
reorganized, taking over advisory responsibilities from
Military Assistance Advisory Group, Vietnam (MAAG-Vietnam).
MACV had authority over all U.S. military activities in
Vietnam, regardless of service. It did not have control
over Seventh Fleet, Air Force units in Thailand, or the
SAC B-52’s used for air strikes in the theater.

MACV closed down 29 Mar 1973.