He's not Alexander the Great, but this man won a Battle of Issus, defeating Pescennius Niger at that site.
This emperor employed the lawyers Papinian, Paul, and Ulpian, and military reforms under this emperor included a 50% pay increase and the disbanding of the Praetorian Guard. This man led campaigns in Mesopotamia against the Osrhoeni and Adiabeni, and he divided Syria into two provinces in response to a challenge to his rule. He's not Alexander the Great, but this man won a Battle of Issus, defeating Pescennius Niger at that site. He fought one rival at Tinurtium before finally defeating that man, Clodius Albinus, at Lugdunum. He took power after those two rivals had Pertinax murdered. This emperor, whose family hailed from Africa, was born at Leptis Magna. For 10 points, identify this Roman emperor and founder of a namesake dynasty, who was the father of Geta and Caracalla.
This emperor employed the lawyers Papinian, Paul, and Ulpian, and military reforms under this emperor included a 50% pay increase and the disbanding of the Praetorian Guard.
Lucius Septimius {Severus} Pertinax