In the summer of 41 BC, Antony, to reassert Roman power in the East, conquered Palmyra on the Roman-Parthian border. Antony then spent the winter of 41 BC in Alexandria with Cleopatra, leaving only two legions to defend the Syrian border against Parthian incursions. The legions, however, were composed of former Republican troops and Labienus convinced Orodes II to invade.
In the summer of 41 BC, Antony, to reassert Roman power in the East, conquered Palmyra on the Roman-Parthian border. Antony then spent the winter of 41 BC in Alexandria with Cleopatra, leaving only two legions to defe,nd the Syrian border against Parthian incursions. The legions however, were composed of former Republican troops and Labienus convinced Orodes II to invade.