Antoninus (

Greek Greek may refer to: Greece Anything of, from, or related to Greece, a country in Southern Europe: *Greeks, an ethnic group. *Greek language, a branch of the Indo-European language family. **Proto-Greek language, the assumed last common ancestor ...

: Άντονίνoς) was a member of the

Household Cavalry The Household Cavalry (HCav) is made up of the two most senior regiments of the British Army, the Life Guards and the Blues and Royals (Royal Horse Guards and 1st Dragoons). These regiments are divided between the Household Cavalry Regiment sta ...

under Emperor

Constantius II Constantius II (Latin: ''Flavius Julius Constantius''; grc-gre, Κωνστάντιος; 7 August 317 – 3 November 361) was Roman emperor from 337 to 361. His reign saw constant warfare on the borders against the Sasanian Empire and Germanic ...

, and later an advisor to the

Sasanian The Sasanian () or Sassanid Empire, officially known as the Empire of Iranians (, ) and also referred to by historians as the Neo-Persian Empire, was the last Iranian empire before the early Muslim conquests of the 7th-8th centuries AD. Named ...

king (

shah Shah (; fa, شاه, , ) is a royal title that was historically used by the leading figures of Iranian monarchies.Yarshater, EhsaPersia or Iran, Persian or Farsi, ''Iranian Studies'', vol. XXII no. 1 (1989) It was also used by a variety of ...

)

Shapur II Shapur II ( pal, 𐭱𐭧𐭯𐭥𐭧𐭥𐭩 ; New Persian: , ''Šāpur'', 309 – 379), also known as Shapur the Great, was the tenth Sasanian King of Kings (Shahanshah) of Iran. The longest-reigning monarch in Iranian history, he reigne ...

. He played a key role in providing

intelligence Intelligence has been defined in many ways: the capacity for abstraction, logic, understanding, self-awareness, learning, emotional knowledge, reasoning, planning, creativity, critical thinking, and problem-solving. More generally, it can be des ...

to the shah, culminating in the sack of Amida in 359 AD.

Life

Ammianus Marcellinus Ammianus Marcellinus (occasionally anglicised as Ammian) (born , died 400) was a Roman soldier and historian who wrote the penultimate major historical account surviving from antiquity (preceding Procopius). His work, known as the ''Res Gestae ...

is the only source on Antoninus: :"There was a certain Antoninus, at first a rich merchant, then an accountant in the service of the governor of

Mesopotamia Mesopotamia ''Mesopotamíā''; ar, بِلَاد ٱلرَّافِدَيْن or ; syc, ܐܪܡ ܢܗܪ̈ܝܢ, or , ) is a historical region of Western Asia situated within the Tigris–Euphrates river system, in the northern part of the ...

, and finally one of his body-guard, a man of experience and sagacity." Ammianus then goes on to describe how Antoninus had been mistreated by the imperial authorities of

. Having grown tired of losing property and wealth to corruption, Antoninus decided to become

turncoat A turncoat is a person who shifts allegiance from one loyalty or ideal to another, betraying or deserting an original cause by switching to the opposing side or party. In political and social history, this is distinct from being a traitor, as the ...

. After contacting the

authorities, he crossed the

Tigris The Tigris () is the easternmost of the two great rivers that define Mesopotamia, the other being the Euphrates. The river flows south from the mountains of the Armenian Highlands through the Syrian and Arabian Deserts, and empties into the ...

river and joined Sasanians. Antoninus later met Ursicinus in the turn of events leading to the siege of Amida. Ammianus (who was present) noted how Antoninus had come to adopt the dress and customs of the Sasanian

court A court is any person or institution, often as a government institution, with the authority to adjudicate legal disputes between parties and carry out the administration of justice in civil, criminal, and administrative matters in acco ...

. There is nothing else known about Antoninus' life, aside from the high position in the court of

. This may in part have been because he spoke both

and

Latin Latin (, or , ) is a classical language belonging to the Italic branch of the Indo-European languages. Latin was originally a dialect spoken in the lower Tiber area (then known as Latium) around present-day Rome, but through the power of the ...

References

{{reflist Year of birth missing Year of death missing 4th-century Romans Defectors People of the Roman–Sasanian Wars People from the Sasanian Empire Shapur II