Constantine the Great,
emperor of the Western Roman Empire (c. 312-324 CE), and later the entire Roman
Empire (c. 324-337), climbed to ultimate power after defeating a host of rivals
in a long and bloody civil war. Despite experiencing firsthand the
complications that come with dividing a single empire among multiple emperors,
Constantine the Great groomed all three of his legitimate sons for rule and
gave them each the title of caesar. When Constantine the Great died in 337, none
of his sons were given primacy. All three of them, Constantine II, Constans I,
and Constantius II all proclaimed themselves to be an augustus (or emperor),
and divided the empire amongst themselves. Constantine II ruled Roman Britain,
Gaul (France) and Spain. Constans I took Italy, North Africa (excluding Egypt)
and some of the Balkans. Constantius II took the remainder of the Balkans, and
the rest of the Roman lands, with land spanning around the Mediterranean from
Greece to Egypt.
Although the empire fell in
succession to Constantine’s sons, it was these sons, and these sons only, who
controlled the Roman Empire—all other relatives were considered a threat. In a
plan probably masterminded by Constantius II, the emperors purged the land of
potential rivals, including many of their own cousins and even a half-brother
of Constantine the Great, ironically also named Constantius. Two notable
imperial cousins that survived the purge were Gallus and Julian, the former
would be a future caesar and the latter a future emperor.




