MACO
- Full name: Military Assault Command Operations (ENT: "Harbinger")
- Motto: "Semper Invictus" (ENT Novel: Beneath the Raptor's Wing)
- United Earth marine corps
- Minimum age of enlistment 16 (ENT Novel: To Brave the Storm)
- Disbanded and reincorporated into Starfleet upon founding of Federation in 2161
- Ranks
- General
- Major
- Lieutenant (ENT Novel: Beneath the Raptor's Wing)
- Sergeant
- Corporal
- Private
- Known MACO bases
- Delta Pavonis (by 2155) (ENT Novel: Beneath the Raptor's Wing)
- Deneva (destroyed 2155) (ENT Novel: Beneath the Raptor's Wing)
- Earth
- Atlanta, Georgia, United States (ENT: "The Expanse")
- West Point, New York, United States (ENT: "Hatchery")
- Training facility
- Janus (ENT: "The Council")
- Other planets in Deneva sector (ENT Novel: Beneath the Raptor's Wing)
- Related records