Pescennius Niger
The history of II "Traiana Fortis" gives an example of the political role of the legions. In 194, Pescennius Niger, governor of the province of Syria, rebelled with the support of, among others, II "Traiana Fortis". His rival was Septimius Severus who would become emperor. In the days before the final battle, the legion changed sides and vowed fidelity to Severus. This would prove to be decisive for Pescennius' defeat.