When co-emperors Diocletian and Maximian retired at the same time in 305 AD their junior emperors took their places and?

When Diocletian and Maximian retired in 305 AD, they appointed their junior emperors, Galerius and Constantius Chlorus, to succeed them. This marked the end of the Tetrarchy, a system established by Diocletian to manage the vast Roman Empire through a division of power among multiple rulers. Following their retirement, tensions and power struggles emerged, leading to a series of civil wars as rival factions vied for control. Ultimately, this instability set the stage for the rise of Constantine the Great, who would reunify the empire.