Page "Galerius" Paragraph 2

He served with distinction as a soldier under Emperors Aurelian and Probus, and in 293 at the establishment of the Tetrarchy, was designated Caesar along with Constantius Chlorus, receiving in marriage Diocletian's daughter Valeria ( later known as Galeria Valeria ), and at the same time being entrusted with the care of the Illyrian provinces.

After a few years Danube campaign against Sarmatians and Goths he receive a command of the legions on the eastern Imperial limits.

Soon after his appointment, Galerius would be dispatched to Egypt to fight the rebellious cities Busiris and Coptos.