Major general was a military rank, the equivalent of which was used by the service organizations of many civilizations. As a traditional army flag officer grade, major general was a junior level general rank of a fighting organization, traditionally between the grades of brigadier and lieutenant general. In comparison to naval ranking systems, this rank was equivalent to the naval rear admiral rank.
This grade existed in some form in many Earth militaries, including that of Old Britain. Dr. Beverly Crusher once convinced Geordi La Forge to attempt to sing "I Am the Very Model of a Modern Major-General", a song from the 19th century operetta The Pirates of Penzance. (TNG: "Disaster"; ST: "Q&A")
|Enlisted personnel||Commissioned officers||Generals and flag officers|
|ENS||LT JG||LT||LT CMDR||CMDR||CAPT||FCAPT||CDORE||RADM||VADM||ADM||FADM|
|2nd LT||1st LT||CAPT||MAJ||LT COL||COL||BRIG||MAJ GEN||LT GEN||GEN||MARSHAL|
|Positions:||Boatswain • Chief • Corpsman • Engineer's mate • Specialist • Technician • Yeoman||TAC • SO • 3rd • 2nd • 1st • CO • DD||Portmaster • Chief of Staff • CinC|
|Services:|| Andorian • Bajoran • Cardassian • Ferengi • Jem'Hadar • Klingon • Romulan • SS • United Earth MACO • United Earth/Federation Starfleet • United States • Vulcan|
Mirror universe: Terran Empire Starfleet • Terran Empire MACO
According to the Star Trek Encyclopedia (4th ed., vol. 2, p. 9), major general was a rank in the Military Assault Command Operations in the 2150s. The insignia for this rank was on display in a diagram of MACO rank and insignia.