Legio II Parthica was created in 197.
Legio I Parthica was created in 197.
Legio III Parthica was created in 197.
Legio II Parthica ) was founded in AD 197 by the emperor Septimius Severus, together with the legio I Parthica , in preparation for his campaign against the Parthian Empire, the third of the four pre-Islamic Persian empires.
Legio II Italica was created in 165.
Legio II Traiana Fortis was created in 105.
Legio Maria was created in 1962.
Legio III Diocletiana was created in 296.
Legio IV Italica was created in 231.
The Legio III Parthica is the least known legion. It was founded by the emperor Septimius Severus in 197 together with the I Parthica and the II Parthica in preparation for his campaign against Parthian Empire (the third of the four Pre- Islamic Persian empires). Severus was successful, the Parthian capital, Ctesiphon was sacked and Mesopotamia (Iraq) was annexed to the Roman Empire. The I Parthica and III Parthica were then stationed in Mesopotamia. The III Parthica was based at Rhesaena on the Upper Chaboras (modern Khabur) where it controlled the road between the former Arabian principalities Edessa and Nisibis. It must have taken part in the campaigns of Caracalla and his successor Macrinus (217), and the war of Severus Alexander against the new Sasanian Persian empire. In 230 the Sasanians invaded the Roman empire and installed an emperor in Emessa (Syria). Severus Alexander retook Syria and invaded Iraq. In 243 this war was renewed and the Legio III, defeated the Sassanians at Rhesaena. In 244 Gordian III invaded Mesopotamia again, but he died and was succeeded by Philip the Arab, who owed his succession to the Sasanian king Shapur I. In 256 Shapur I captured Satala, the fortress of the Legio XV Apollinaris in northenr Mesopotamia, and two years later he reached the Black Sea and sacked Trapezus. the emperor Valerian invaded Mesopotamia, he was defeated and captured. Odaenathus of Palmyra (261-267) and then the emperor Diocletian (284-305), restored Roman fortunes and in 298, a peace treaty was concluded in which the Sassanians had to give up northern Mesopotamia. The Legio III must have played a role during these campaigns, but we have almost no information. The Notitia Dignitatum, written at the beginning of the fifth century, recoded the Legio III Parthica as being based at Apadna in Osrhoene, near the confluence of the rivers Chaboras and Euphrates.
The Legio I Parthica army founded by the emperor Septimius Severus in 197 fin preparation for his war against Parthian Empire (the Third of the four pre-Islamic Persian empires). It remained stationed in the Middle East is recorded until the early 5th century and participated in other wars between the Romans and the Persians,
Before becoming emperor Hadrian served as a military tribune three times in three different legions (The Legio II Adiutricix, Legio V Macedonica and Legio XXII Primigenia) and as a leguatus legionsis (commander of a legion) in the Legio I Minervia.
The Legio II Cyrenaica was initially stationed in Alexandria, together with the Legio XXII Deiotariana. It was then transferred to Bostra, in Arabia Petraea.