Adrian Bronson: Grand Senator, CoDominium
Martin Grant: Grand Senator, CoDominium; brother of John Grant, above
Lysander Collins: Crown Prince of the Collins Branch of the Dual Monarchy of Sparta. First appeared in Prince of Mercenaries, where he had a temporary commission as Cornet in Falkenberg's Legion while they were operating on the CoDominium prison planet of Tanith. Went as an unofficial representative for his planet to the Legion to discuss Sparta's hiring the Legion. Commanded the Prince Royal's Own in the Spartan Army during the Helot War; became Lysander I at his father's death at the end of that conflict.
John Christian Falkenberg II: Professor of Military History, CoDominium University, Rome, Earth; father of Colonel John Christian Falkenberg III. Was never a direct character, only made reference to; in Go Tell the Spartans, Prince of Sparta, and Falkenberg's Legion, excerpts from his lectures introduced chapters.
John Christian Falkenberg III: Colonel, Commanding Officer, Falkenberg's Mercenary Legion (also known as the 42nd Regiment); former Colonel, 42nd CoDominium Line Marines. Son of Professor John Christian Falkenberg II. First appearance in The Mercenary, in which he was the central character, as well as West of Honor and Prince of Mercenaries. Falkenberg's Legion included The Mercenaryand West of Honor along with some previously unpublished material about Falkenberg's youth. After graduating from the CoDominium Naval Academy on Luna, he held a commission in the Navy before transferring to the Marines, where he became the youngest marine captain in the history of the Fleet until Harlan Slater.
He became a mercenary commander after being court-martialed for insubordination
Sergei Lermontov: Grand Admiral, CoDominium Space Navy
Harlan “Hal” Slater: Former Captain, 42nd Line Regiment, CoDominium Marines; Lieutenant Colonel, Falkenberg's Mercenary Legion (Retired); General, Royal Spartan Army. First appeared in West of Honor, when he was a newly commissioned Marine Lieutenant assigned under then Captain Falkenberg on the planet Arrarat
Caldwell Whitlock: Political analyst, frequently hired by Falkenberg's Legion and/or Grand Admiral Lermontov. First appeared in The Mercenary, where he served as a consultant to Falkenberg during his first mercenary action. Later employed by elements of Falkenberg's Legion and/or the Dual Monarchy of Sparta during the Helot War in Prince of Sparta; he settled on Sparta, having left Earth just before the fall of the CoDominium.
First Empire Period
Galen Deitinger: Vessel First Rank (Captain), Sauron Heavy Cruiser Fomoria (“Dol Guldur”), the only Sauron vessel to survive the Battle of Sauron. In escaping that system, the Fomoria made a random-jump that took it to the Byers' Star System, having an inhabited moon, Haven, which had become isolated from the rest of the Empire after the departure of the 77th Imperial Marines
Second Empire Period
Horace Hussein al-Shamlan Bury: Trader, Imperial Traders League; Chairman of the Board, Imperial Autonetics Corporation; operative, Imperial Space Navy Intelligence
Lavrenti Kutuzov: Admiral, Imperial Space Navy (Retired)
Kevin Renner: Commodore, Imperial Space Navy Reserve