Commandant is a title that has been used in many organizations across the galaxy. Among those to have used the term, are Klingons, the Kradin, and Humans. Typically, the title is applied to someone who is in charge of a group of personnel, such as an assault force, training faculty, or prison guards.
Starfleet uses the title for the officer in charge of Starfleet Academy, and is known as the Commandant of Starfleet Academy. The Mirror-Starfleet uses this as well, to denote those equivallent to Commander-usually in charge of a starship's platoon for away team missions. (TOS movie: Star Trek VI: The Undiscovered Country, DS9 episode: "Paradise Lost", VOY episode: "Nemesis" & ST novel "Spectre")
Prefix Title earned by gaining +40,000 (Ally) faction with the Freeport Militia in West Freeport.
Commandant is a rank and title used by various organisations across the galaxy.
Starfleet Academy had used the title commandant to refer to high ranking officers in charge of the Academy. (TNG: "Coming of Age"; DS9: "Paradise Lost") Claire Masters served as the commandant of the Canberra campus of Starfleet Academy during the 2340s and 50s. (Star Trek: Swiftfire: "No Rest for the Wicked")
As a generic mode of address, "commander" was appropriate to many military officers - almost anyone holding a distinct unit or ship command could be called "commander" in this way, although the commanding officers of capital ships usually preferred to be addressed as "Captain"or Navigation Officer. Alongside this generic usage, "Commander" was also used as a specific rank, with several different meanings depending on the context.
In many naval hierarchies, including those of the Old Republic, the Galactic Empire, the Rebel Alliance, the New Republic and the Galactic Alliance, a Commander ranked above a Captain.
In the ex-Imperial naval forces loyal to Thyferran Chief of State Ysanne Isard, there was a second usage of Commander described by Fliry Vorru as being greater than that of "a mere Captain," but this second rank is rarely attested, and may have stemmed from a confusion with the Imperial Navy's rank of Captain of the Line. Other officers like Commander Gherant were known at the height of the Empire to have been inferior in rank to Captains like Firmus Piett.
In Rebel Alliance and New Republic Starfighter Command organizations, references exist to a rank of Commander, sometimes specifically Flight Commander or Wing Commander, covering at least one tier of the hierarchy between Captain and Colonel; by the time of the Galactic Alliance, these titles had apparently been replaced by Major and Lieutenant Colonel.
The promotion of Commander Eldo Davip to Major General after the Battle of Borleias suggests that in some elements of the New Republic or Galactic Alliance military, a rank of Commander may replace Brigadier.
The Mandalorians used the rank of commander.
Among the Yuuzhan Vong, most warship captains and a few task force commanders bore a rank of Commander, and superior officers were known as Supreme Commanders.
In the armed forces of the Chiss Ascendancy, variations on "Commander" were used as ranks or titles in a variety of different contexts. In the years before the Clone Wars, a frontier patrol group of the Expansionary Fleet could be commanded by an officer with the title of Force Commander, often simply styled "Commander" (Crahsystor in Cheunh). Much later, in c. 19–22 BBY, examples are also known of a Phalanx Commander leading a Household Phalanx and a Station Commander commanding a defense platform, while the title Cadet Commander was given to the senior cadet in a Chiss training squadron, who could also be addressed as "Lieutenant". By the time of the Swarm War in 37 ABY, the term "Commander" was used in Basic to translate the rank analogous to a naval Commander in the Galactic Alliance, one grade below Captain, but is not clear whether this usage corresponded to any of the earlier terminology.
The title "Commander-in-Chief" was used by some civilian heads of state in their capacity as head of their government's military forces - for instance, the Chief of State of the Alliance to Restore the Republic was also, ex officio, Allied Forces Commander-in-Chief.
The usage of "Commander" in Star Wars is complicated by the fact that authentic military usage treats "Commander" as a rank, a position, and a title. As a rank, in the English language it refers to a senior officer (NATO Code OF-4, US pay grade O-5) immediately inferior to a captain (NATO Code OF-5, US pay grade O-6); this usage is found in the Royal Navy (and its various Commonwealth descendants) and the United States Navy. As a position, it refers to the officer who literally commands a unit, installation, vessel, or formation. As a title, it typically refers to officers in positions of high responsibility whose command encompasses multiple independent commands. Although the title is related to the position, not all officers who are positional commanders are titular commanders, as other titles exist for the position (e.g., officer in charge, commanding officer, commanding general, etc.). It is possible and even common for officers holding the rank of commander not to hold the position or title.
The specific nature of "Commander," particularly as it is used in the Imperial Navy, is a subject of some controversy. Although the English-language model has clear dominance in the fictional reality of Star Wars, there are deviations from it, most notably the case of Commander Ait Convarion, who was described in The Bacta War as being "a Commander, not a mere Captain," and this has been used to support the existence of an Imperial rank of commander broadly comparable to a commodore (with proposed authentic support from such instances as the Dutch Commandeur and the Russian Imperial Navy's rank of Kapitan-Kommandor). At the same time, other commanders have been seen to be decidedly inferior to captains, such as Commander Gherant in the Dagobah Limited expansion set to the Star Wars Customizable Card Game, who was explicitly called a "deck officer" who had been "hand-picked by Captain Piett."
It must also be considered that Vorru was a politician, not an expert on naval protocol. Furthermore, if one hesitates to apply the model of authentic usage of English-language naval forces to the fictional Imperial Navy, one must also hesitate to use the rogue forces of ex-Imperial warlords as authoritative guides to the correct usage of the Imperial Navy. In any event, the matter is complicated by the imprecise use of "Commander" throughout the fictional Star Wars universe as a generic title of address for any officer in a position of responsibility, including Army officers (similar to the authentic usage of the French title of Commandant).
The analogous air force rank of "Wing Commander" (borrowed into the Royal Air Force from the Royal Navy) is also a source of some confusion, as the Alliance has been seen to use wing commander alongside "flight commander," which may be a rank, position, or title. It is possible that the difference in titles stems from the fact that the Alliance military and naval forces are heterogeneous in composition and background, and the parallel of wing commander and flight commander may reflect the imperfect combination of slightly different traditions (a similar problem arises regarding the specific rank of General Etahn A'baht in the New Republic).