Advance toward Aquileia
Constantine II advances through northern Italy toward Aquileia after beginning his attempt to seize territory from Constans.
Permanent historical records · Updated 2026-11-03
340 in Roman Empire
Explore 19 historical events and records for Roman Empire in 340.
Historical records for Roman Empire in 340
Sorted by month and day. Records with no month are shown last. Showing 19 of 19 unique records.
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April
Body Cast into River Alsa
A later account states that Constantine II's body is thrown into the River Alsa after he is killed near Aquileia.
Body Recovered after Battle
Traditional accounts state that Constantine II's body is later recovered following his death in the civil war against Constans.
Constans Absent at Naissus
Constans is away from the immediate invasion route when Constantine II enters Italy, leaving selected troops to confront the invader.
Constans Sends Troops
When Constantine II invades Italy, Constans sends troops to confront his brother while Constans himself is away from the immediate invasion route.
Death of Constantine II
Troops loyal to Constans ambush and kill Constantine II near Aquileia during his invasion of northern Italy.
Invasion of Italy
Constantine II invades territory ruled by his brother Constans during a dispute over the division of the empire.
Privileges Revoked after Death
Posthumous imperial legislation treats Constantine II as a public enemy and withdraws privileges granted during his final campaign.
Other events (month unknown)
Constans Annexes Western Realm
Constans assumes control of Constantine II's former territories in Gaul, Britain and Spain after his brother's death.
Constitution of Roman Empire
The triple rule of the Empire ends when Constantine II dies
Damnatio Memoriae
After Constantine II's death, his memory is officially condemned and later legislation treats him as an enemy.
Death of Constans
Death of Constantine II, kiled by Constans who now holds supreme power in the west
Invasion of Rome
Constantine II marches against Rome
Invasion of Rome
Constans ambushes Constantine II & kills him then throws his body into the river Alsa
Marcellus Associated With Ancyra
Marcellus, the city's bishop, became a prominent and controversial participant in fourth century debates about the Trinity.
Marcellus Faces Doctrinal Opposition
The theology of Marcellus of Ancyra attracted criticism from other bishops during the Arian controversy.
Royal Burial after Recovery
Later tradition records that Constantine II receives an imperial burial after his body is recovered following the Aquileia campaign.
Rule of Empire
Death of Constantine II, kiled by Constans who now holds supreme power in the west
Rule of Empire
The Empire splits into the East under Constantius II & the West under Constans
How these records were prepared
Generated from the World History Database historical_events table. Identical display records are collapsed; descriptions otherwise retain the stored text. Coverage and source quality vary. Check primary and specialist sources before citing individual historical claims.