| Legio II Parthica | |
|---|---|
 Antonininaus of Gallienus. Reverse shows centaur and the inscription "LEG II PART VI P VI F". | |
| Active | 197 to sometime in the 5th century |
| Country | Roman Empire |
| Type | Roman legion (Marian) |
| Role | Infantry assault (some cavalry support) |
| Size | Varied over unit lifetime. Approx. 5,500 fighting men + support at the time of creation. |
| Garrison/HQ | Castra Albana, Italia (197–218) Apamea, Syria (218–234) Moguntiacum, Germania Superior (234–238) Castra Albana (238 – beginning of the 4th century) Bezabde, Mesopotamia (in 360) Cepha, Mesopotamia (c. 400) |
| Nickname(s) | Parthica, "Parthian" (since 197) Pia Fidelis Felix Aeterna, "forever faithful, loyal and blest" (since 218) V Fidelis V Pia, "Five times loyal, five times faithful" (253/260) VI Fidelis VI Pia, "Six times loyal, six times faithful" (before 260) |
| Mascot(s) | Bull and centaur |
| Engagements | Septimius Severus Parthian campaign (197) Severus Britannic campaign (208–211) Caracalla Alamannic campaign (213) Battle of Antioch (218) Alexander Severus Sassanid campaign (231) Siege of Bezabde (360) vexillationes participated in many other campaigns |
| Commanders | |
| Notable commanders | Septimius Severus (campaign) Caracalla (campaign) Alexander Severus (campaign) |
Legio II Parthica ("Parthian-conquering Second Legion") was a legion of the Imperial Roman army founded in AD 197 by the emperor Septimius Severus (r. 193–211), for his campaign against the Parthian Empire, hence the cognomen Parthica. The legion was still active in the beginning of the 5th century. The legion's symbol was a centaur.