| Legio XIII Gemina | |
|---|---|
 Map of the Roman empire in AD 125, under emperor Hadrian, showing the LEGIO XIII GEMINA, stationed at Apulum (now Alba Iulia, Romania), in the province of Dacia, from AD 106 to c. 271 | |
| Active | 57 BC to sometime in the 5th century |
| Country | Roman Republic and Roman Empire |
| Type | Roman legion (Caesarian) |
| Role | Infantry assault (some cavalry support) |
| Size | Varied over unit lifetime. Approx. 3,500 fighting men + support at the time of creation. Expanded and given the cognomen Gemina in 31 BC. |
| Garrison/HQ | Burnum, Illyricum (1st century BC) Emona, Italia (1st century) Augusta Vindelica, Germania Superior Poetovio, Pannonia (1st century) Roman Dacia (106 – c. 270) Dacia Aureliana (since 270) Babylon in Egypt (400s) |
| Nickname(s) | Gemina, "The twin" (since 31 BC) Pia Fidelis, "Faithful and loyal"[1] |
| Motto(s) | Leo Rugit Rursum (The Lion Roars Again) |
| Mascot(s) | Lion |
| Engagements | Gallic Wars (58–51 BC) Battle against the Nervians (57 BC) Battle of Gergovia (52 BC) Battle of Alesia (52 BC)–uncertain Siege of Corfinium (49 BC) Battle of Dyrrhachium (48 BC) Battle of Pharsalus (48 BC) Battle of Thapsus (46 BC) Battle of Munda (45 BC) Battle of Actium (31 BC) 1st and 2nd Battle of Bedriacum (69) Dacian Wars (101–102,105–106) Vexillationes of the 13th participated in many other campaigns. |
| Commanders | |
| Notable commanders | Julius Caesar, Marcus Salvius Otho, Marcus Antonius Primus |
Legio XIII Gemina,[a] in English the 13th Twin(s) Legion (either "Female Twin" or "Neuter Twins"); was a legion of the Imperial Roman army. It was one of Julius Caesar's key units in Gaul and in the civil war, and was the legion with which he crossed the Rubicon in January, perhaps on 10 January, in 49 BC. The legion appears to have still been in existence in the 5th century AD. Its symbol was the lion.
- ^ Steiner, Johann Wilhelm C. (1851). Codex inscriptionum romanarum Danubii et Rheni. Seligenstadt, der Verfasser. p. 253.
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