After the success of Septimius Severus against Parthia, I and III Parthica remain in the region in the camp of Singara to avoid following rebellions and attacks from the Parthian Empire. The newly created province of Mesopotamia was to be an exception: it was ruled by men of equestrian order, not senators.
LegioIIParthica was a Roman legion levied by emperor Septimius Severus in 197 AD, for his campaign against the Parthian Empire of Iran, hence the cognomen Parthica.
Together with its twin legions I Parthica and III Parthica, the Second Parthian legion was levied for the attack on the eastern frontier.
After this war, IIParthica returned to Italia, and was stationed near Rome, in Castra Albana (Albano Laziale) – it was the first legion stationed in Italia in the last two centuries.
Legio III Parthica was a Roman legion levied by emperor Lucius Septimius Severus in 197 AD, for his campaign against the Parthian empire, hence the cognomen Parthica.
Together with its sister legions I Parthica and IIParthica, the third Parthian legion was levied for the attack on the eastern frontier.
III Parthica remained in the region afterwards, garrisoning the new province of Mesopotamia.