sentences:  Here it was agreed that Galerius’ long-time friend and military companion Licinius, who had been entrusted by Galerius with the defense of the Danube while Galerius was in Italy, would become Augustus in the West, with Constantine as his Caesar.In the East, Galerius remained Augustus and Maximinus remained his Caesar.Maximian was to retire, and Maxentius was declared a usurper.