|Earth Second lieutenant insignia|
|Japan, 20th century|
1930s – 1940s (Earth)
mid-23rd century (Ekos)
Second lieutenant was a military rank. A traditional infantry rank, second lieutenant was the lowest officer grade, subordinate to a first lieutenant. Infantry lieutenants fell below captain, and commanded a platoon, consisting of about thirty troops. In comparison to naval ranking systems, a second lieutenant was equivalent to the grade of ensign or sublieutenant, depending on the specific arrangement.
This rank was used by the United States armed forces and police, represented by a single rectangular gold bar uniform insignia beginning around the 20th century. 2nd lieutenants existed in other Earth nations, such as World War II Germany and Japan. Japanese second lieutenants wore a single star on a red epaulet with one wide center gold braid flanked by thinner braids on either side. In the German armies, this was translated as Leutnant, but in the SS, second lieutenants were referred to as Untersturmführer ("junior storm leader"). The collar insignia for this was a black square bordered with white, with three silver pips in a diagonal line.
In a holodeck simulation of a Nazi campaign in France, a group of Hirogen hunters took the persona of 1940s German officers. The Beta Hirogen, named Turanj, wore an SS uniform displaying the insignia for Untersturmführer. (VOY: "The Killing Game", "The Killing Game, Part II")
|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