Pescennius Niger
In 193, the Governor of Pannonia Superior, Septimius Severus claimed the purple and moved to Italia. "I Italica" supported Severus, but did not move to Italy. The legion fought against Severus' rival, Pescennius Niger, besieging Byzantium together with "XI Claudia", fighting at Issus. The First possibly took part in the Parthian campaign of Severus (198).