After Constantine: Purges, Fratricide, and Magnentius

Constantine's Legacy and Succession

• 💡 After Constantine the Great's death in 337 AD, his unified Roman Empire faced a dangerous power vacuum, leading to fear, violence, and suspicion.
• 📌 Constantine had reshaped the empire, founded Constantinople, and bound imperial authority to Christianity, but left behind a dynasty with many potential heirs.

Early Dynastic Violence

• ⚔️ Even before his death, Constantine executed his eldest son, Crispus, a respected general, in 326 AD, for unclear reasons, marking an early instance of internal dynastic violence.
• 🩸 Following Constantine's death, a violent purge swept through the imperial family, eliminating many male relatives and potential rivals, leaving only his three surviving sons.

The Sons' Rule and Conflict

• 👑 Constantine's three sons—Constantine II, Constans, and Constantius II—were proclaimed Augusti, dividing the empire into Western and Eastern halves.
• 💥 Constantine II, the eldest, invaded Italy to assert authority over Constans but was ambushed and killed in 340 AD, leaving Constans to rule the entire Western Empire.
• 🌊 Constans visited Britain in 342/343 AD, a dangerous winter crossing, possibly due to unrest in northern Britain, becoming the last legitimate Roman emperor to visit the island.

Magnentius's Usurpation and Civil War

• 🛡️ In 350 AD, Flavius Magnus Magnentius, a senior officer, usurped power in Gaul, leading to Constans' death and plunging the empire into a brutal civil war with Constantius II.
• ⚔️ The Battle of Mursa in 351 AD was one of the bloodiest Roman battles, with tens of thousands of Romans killed by other Romans, though Magnentius escaped.
• 💀 Magnentius was finally defeated at the Battle of Mons Seleucus in 353 AD and subsequently took his own life, ending his usurpation.

Aftermath and Terror in Britain

• 🔍 Following his victory, Constantius II initiated a severe purge of Magnentius's supporters across the empire, including in Britain.
• ⛓️ A palace official named Paulus, nicknamed "Katina" (the chain), was sent to Britain, where he exceeded his authority, fabricating charges and spreading terror, even leading to the death of the vicarius of Britain, Martinus.
• ⚠️ The period after Constantine's death was characterized by purges, fratricide, and civil war, profoundly impacting even distant provinces like Britain.