Starfleet ranks ( mirror ) In the mirror universe , the rank s and uniform s of the Terran Empire ' s were similar to those found in the Federation ' s universe . Starfleet . The was the primary space force of the Empire . Flag officers . Terran Starfleet admirals were the highest grade of commissioned officer s , known as flag officer s . Personnel were awarded these ranks for rising through the line officer ranks of military service ; the admiral ty was based at Starfleet Command on Earth . They wore uniform jackets with red and silver division stripes at the shoulders over a white undershirt and necktie , and were the only officer grade that had sleeve stripe insignia in regular uniform wear . These dress jackets displayed only the Empire insignia on their right shoulder , with no opposite assignment patch . Fleet admiral . The most senior flag rank , Starfleet fleet admiral s in 2155 ( like Fleet Admiral ) wore a flag officer epaulet rank insignia of three gold chevrons with two smaller chevrons between them . The epaulets had admiral rank stripes , a thick silver band with a two separate silver stripes separated by two silver braids . Admiral . Starfleet admiral s ( like Admiral Black ) wore flag officer epaulet rank insignia . The admiral ' s sleeves had rank stripes of several braids and thickness . Line officers . Line officers were ranked captain or lower . The slave species of the Terran Empire were allowed to serve as line officers . Captain . Terran Starfleet captains were the most senior line officers . The rank of captain was held by starship commanding officer s , and was senior to commander . Commander . Terran Starfleet commanders were the second - most senior line officers . This rank was held by department head s and starship executive officer s . Commander was inferior to captain , and superior to the lieutenant grades . Lieutenant commander . Terran Starfleet lieutenant commanders served as department heads . They were inferior to commanders , and superior to the lieutenants . Lieutenant . Terran Starfleet lieutenants were inferior to the commander grades , and superior to ensigns . Lieutenant junior grade . Terran Starfleet lieutenants junior grade were the second - most junior commissioned officers . This rank was awarded as a promotion to ensigns , or as a commissioned to leading members of graduating cadet classes , and was immediately inferior to lieutenant . Ensign . Terran Starfleet ensigns were the most junior commissioned officers . This rank was achieved by Academy graduates . Enlisted . Terran Starfleet enlisted personnel ranked below commissioned officers . These personnel joined Starfleet as crewpeople and usually had not attended a full course of study at Starfleet Academy . Chief . Chief was the highest enlisted rank in Starfleet . This rank was the equivalent of a sergeant . Crewman . Crewman was the lowest enlisted rank in Starfleet . This rank was the equivalent of a MACO private . Crewmen ( like ) wore no officer insignia , sashes or braces . MACOs . The MACOs were the infantry forces of the Terran Empire . MACO uniforms were the same as in the counterpart universe . The only difference was the MACO patch , which changed from a shark to a skull . See also : MACO ranks