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PART OF. . . REGIMENT Four battalions make up the 1st Marine Regiment, which is commanded by a colonel
PART OF. . .
DIVISION Four regiments and seven other units make up the 1st Marine Division, which is led by a major general *The same grade; title depends on specific responsibilities
(1)The senior enlisted Marine of the entire Corps, picked by the Commandant of the Marine Corps
(2) A technical specialist with extensive knowledge of and training with systems or equipment that is beyond the duties of general officers or other personnel. There are five successive grades Sources: U.S. Marine Corps; GlobalSecurity.org satellite image from Digital Globe via Google Earth TIME Graphic by Jackson Dykman and Joe Lertola; timeline by Jeremy Caplan
