Events

By Place

Roman Empire

• March 1 — Diocletian and Maximian appoint Constantius Chlorus and Galerius as Caesars. This is considered the beginning of the Tetrarchy.
• Constantius Chlorus restores the northern Rhine border after defeating the Franks. Franks keep living in the north, because the Roman population has fled.
• Constantius Chlorus retakes northern Gaul from the usurper Carausius, who retains control of Britain
• Allectus assassinates Carausius and usurps power in Britain.

Asia

• Sassanid Shah Bahram III succeeds Bahram II.
• Sassanid Shah Narseh succeeds Bahram III.
• Tuoba Fu succeeds Tuoba Chuo as chieftain of the Chinese Tuoba clan.

By Topic

Religion

• Probus succeeds Rufinus as Patriarch of Constantinople.

Births

Deaths

• Tuoba Chuo, chieftain of the Chinese Tuoba tribe
• Carausius, usurper in northern Gaul and Britain