The sole source for Maximus' career is inscription Année Épigraphique (1985) 721, engraved on the memorial Maximus erected to himself while still alive, found at Philippi, Greece:[1] Ti(berius) Claudius / Maximus vet(eranus) / [s(e)] v(ivo) f(aciendum) c(uravit) militavit / eque(s) in leg(ione) VII C(laudia) P(ia) F(ideli) fac/ tus qu(a)estor equit(um) / singularis legati le/ gionis eiusdem vexil/ larius equitum item / bello Dacico ob virtu/ te(m) donis donatus ab Im/ p(eratore) Domitiano factus dupli(carius) / a divo Troiano(!)
in ala secu(n)d(a) / Pannoniorum a quo et fac/ tus explorator in bello Da/ cico et ob virtute(m) bis donis / donatus bello Dacico et / Parthico et ab eode(m) factus / decurio in ala eade(m) quod / cepisset Decebalu(m) et caput / eius pertulisset ei Ranissto/ ro missus voluntarius ho/ nesta missione a Terent[io Scau]/ riano consulare [exerci]/ tus provinciae nov[ae Mes]/[opotamiae....Translation: Tiberius Claudius Maximus, veteran, arranged this memorial while he was alive.
He received his honourable discharge as a voluntarius from the consular commander Terentius Scaurianus, of the army of the Provincia Mesopotamia Nova.If the location of his tombstone represents his home-town (as it often did with retired veterans),[2] Maximus was born in Colonia Iulia Augusta Philippensis, a colony of Roman military veterans founded in 42 BC (at Philippi, northern Greece) and much expanded under emperor Augustus (ruled 30 BC – AD 14).
[6] He claims to have held three higher positions in the contingent, although it is unclear whether all of these were formal military ranks or simply roles that Maximus had performed.
As reward, Trajan decorated Maximus and promoted him to the rank of decurion (leader of a turma), the cavalry equivalent of centurion in the infantry.
[16] Maximus was finally granted an honourable discharge (honesta missio) in AD 116–7 by Decimus Terentius Scaurianus, one of Trajan's top generals and then commander of Roman forces in the newly established (and soon relinquished) province of Mesopotamia Nova.
This image seems stylised to reflect the Thracian Heros stereotype (normally showing a rider spearing an animal or human on the ground, although in this case, Maximus is shown approaching Decebalus holding a sword in his front hand).
Most likely, troopers were under orders to capture Decebalus alive if possible, so that he could form the centrepiece of Trajan's forthcoming Triumph in Rome, to celebrate his Dacian victory.
But a passage in the Epitome of the History of Rome of Cassius Dio makes clear that he was already dead: "Decebalus, when his capital had been destroyed and his whole territory occupied, and he was himself in danger of being captured, killed himself.