The legion was reconstituted in 42 BC and fought for Augustus (then Octavian), Lepidus and Mark Antony in the Battle of Philippi against the murderers of Caesar. After this, they followed Mark Antony in his campaign against Parthia and were defeated with him at Actium. Augustus then took control of the legion and settled the veterans in Patras. The legion rebelled and lost its "cognomen" "Equestris" as punishment. Replacements were added from other legions, and the Tenth was rebaptized "Gemina".