The XIIth Imperial Legion is one of the Garlean Empire's armies in Final Fantasy XIV. Led by Crown Prince Zenos yae Galvus, the XIIth Imperial Legion is known for its brutality. Recently victorious in putting down a rebellion in Doma, the legion was also given command of Ala Mhigo following the supposed death of Gaius van Baelsar and fall of the XIVth Imperial Legion.
Under its merciless Legatus, power is valued above all else, and the prince has little use for those who will not "hunt" their own prey, often killing his own soldiers should they fail to meet his expectations. Because the legion controls two annexed territories, Zenos remains in Gyr Abania as its viceroy, while Doma is commanded by his appointed viceroy, Yotsuyu goe Brutus.
- Zenos yae Galvus (Crown Prince)
- Asahi sas Brutus (Ambassador)
- Fordola rem Lupis (Crania Lupi)
- Maxima quo Priscus (Centurio)
- Aulus mal Asina (Chief magitek Technician)
- Yotsuyu goe Brutus (Appointed viceroy)
- Severa (Deserter)
During the events of Final Fantasy XIV: Stormblood, the Scions of the Seventh Dawn, the Ala Mhigan Resistance and the Eorzean Alliance battle with the XIIth Legion is the mission to free Ala Mhigo from the empire. They soon know defeat after facing the might of Zenos, forcing them to regroup and plan a new strategy. Resolving to force the XIIth Legion to fight on two fronts, the Scions travel to Doma to reignite the flames of rebellion and free the nation, thereby giving the Eorzean Alliance and the Resistance a better chance at defeating Zenos.
The Scions free Doma after rallying its people under Hien Rijin and the Doman Liberation Front, forcing members of the XIIth in Doma to retreat. Taking this chance, the Eorzean Alliance and the Resistance conduct their bold campaign to force the XIIth Legion out of Ala Mhigo: Rhalgr's Beacon. After suffering many casualties and contending with a powerful primal, the Warrior of Light defeats Zenos, with the prince committing suicide.
With their Legatus believed dead, the surviving members of the XIIth Legion retreat in earnest with Ala Mhigo liberated from the empire. Severa deserts the legion following the liberation of Ala Mhigo and eventually finds Gaius, and becomes travelling companions with him to eliminate the Ascians. Zenos, revealed to have transcended his being as the result of gaining the ability to artificially use the Echo, possessing the bodies of an Ala Mhigan Resistance member and a Centurion to eventually reclaim his body from Elidibus. Zenos also throws Garlemald into civil war after murdering his father Varis zos Galvus to prevent him from using the alchemical weapon Black Rose to eliminate the Warrior of Light. He later usurps the imperial throne with the aid of the rogue Ascian Fandaniel, fully willing to start an apocalypse to set the stage for his reunion with the Warrior.