Battle of Pharsalus
The Twelfth legion, as it is perhaps better known, fought in the Battle against the Nervians, and probably also in the Siege of Alesia. The Twelfth fought at the Battle of Pharsalus (48 BC), when Caesar defeated Pompey. After Caesar won the civil war, the legion was named "Victrix", and enlisted in 43 BC by Lepidus and Mark Anthony. Mark Anthony led the Twelfth, renamed "XII Antiqua" during his campaign against the Parthian Empire.