Paetus invaded the Kingdom of Commagene, as head of the Legio VI Ferrata.
From 54 AD to 68 AD the Sixth Legion Ferrata served under Gnaeus Domitius Corbulo at Artaxata and Tigranocerta against the Parthians.
Legio XVIII | Legio XVII | Legio XV Apollinaris | Legio XIX | Legio V ''Iovia'' | Legio V Iovia | Legio VI Herculia | Legio VI Ferrata | Legio II Augusta | legio VI Ferrata | legio III Gallica | Legio XX Valeria Victrix | Legio XIV Gemina | Legio X Equestris | Legio VI ''Ferrata'' | Legio IV Scythica | Legio II ''Augusta'' | Legio I Adiutrix |
He is next heard of in the winter of 114/115, during Trajan’s Parthian war, commanding Legio VI Ferrata, which according to a fragment of the Parthica of Arrian he marched in deep snow (having secured snowshoes from native guides) across the Armenian Taurus to get to Tigranakert.