How did Constantine I divide the Roman Empire among his surviving sons after his death?

Following the death of Constantine I in 337, his three surviving sons—Constantine II, Constans I, and Constantius II—each assumed the title of augustus and divided the Roman Empire among themselves.12

The division of territories was as follows:

• Constantine II received the western provinces, specifically Britain, Gaul, and Spain.13
• Constans I was granted the central prefecture, which included Italy, Africa, and Illyricum.3
• Constantius II took control of the eastern provinces, including Thrace, Macedonia, Greece, Asia, and Egypt.32

This arrangement followed a period of confusion and the violent elimination of other members of the imperial family. The brothers' initial power-sharing agreement eventually collapsed, leading to internal conflicts and civil wars as they vied for sole control of the empire.321