378

378

This article is about the year 378. For other uses, see 378 (number).

Centuries:	3rd century · 4th century · 5th century
Decades:	340s 350s 360s 370s 380s 390s 400s
Years:	375 376 377 378 379 380 381

378 by topic v • d • e
Politics
State leaders - Sovereign states
Birth and death categories
Births - Deaths
Establishment and disestablishment categories
Establishments - Disestablishments

Events

Mid-February - The Lentienses cross the frozen Rhine, invading the Roman Empire.
May - The Lentienses are defeated by Gratianus in the Battle of Argentovaria.
August 9 - Battle of Adrianople: A large Roman army led by Emperor Valens is defeated by the Visigoths in present-day Turkey. Valens is killed along with two-thirds of his army.
Theodosius I becomes eastern Roman emperor after the death of Valens.
Valens completes the aqueduct of Constantinople begun by Constantine I.

Siyah K'ak' begins to replace Mayan kings with relatives of Spearthrower Owl, emperor of Teotihuacan.