Explore the major historical events, famous births, and notable deaths that occurred in the year 451. This year saw 4 significant events.
Battle of the Catalaunian Plains: Roman and Visigoth forces defeat Attila the Hun in northeast France, halting the Hun invasion of Roman Gaul [exact date disputed]
Battle of Avarayr: Armenian rebels are defeated militarily by the Sassanid Empire but are guaranteed freedom to openly practice Christianity
10th recorded perihelion passage of Halley's Comet
Council of Chalcedon (4th ecumenical council) opens, annuls acts of second Council of Ephesus, and adopts doctrine of Pope Leo's Tome
Battle of the Catalaunian Plains: Roman and Visigoth forces defeat Attila the Hun in northeast France, halting the Hun invasion of Roman Gaul [exact date disputed]
Battle of Avarayr: Armenian rebels are defeated militarily by the Sassanid Empire but are guaranteed freedom to openly practice Christianity
10th recorded perihelion passage of Halley's Comet
Council of Chalcedon (4th ecumenical council) opens, annuls acts of second Council of Ephesus, and adopts doctrine of Pope Leo's Tome