Re: Event of the Year
 

451

* April 7 - The Huns sack Metz.
* June 20 - The Huns and the Ostrogoths facing the Romans and the Visigoths achieve at best a draw in the Battle of Chalons. After the battle, between 10,000 and 20,000 men lie dead on the Catalaunian Fields.
* In Italy, refugees flee to swamp areas near modern-day Venice.

Re: Event of the Year
 

450

Saxons, Angles and Jutes invade Britain (traditional date), marking the beginning of the usage period of Old English.

Re: Event of the Year
 

449

October, a Roman synod repudiates all the decisions of the Second Council of Ephesus.

Re: Event of the Year
 

448

* Embassy to Attila from Theodosius II; Priscus records one of the few eyewitness accounts of the Hun kingdom.

Re: Event of the Year
 

447

Battle of the Utus: Attila the Hun meets the Romans in an indecisive battle. The Huns invade the Balkans as far as Thermopylae.

Re: Event of the Year
 

446

The Cor Tewdws (Collage of Theodosius), Llantwit Major is burned down

Re: Event of the Year
 

445

Attila murders his brother and co-king Bleda (Bleda could also have died by other means; the cause of and circumstances surrounding his death are not known conclusively)

Re: Event of the Year
 

444

The Irish city of Armagh is founded by St. Patrick.

Re: Event of the Year
 

443

The Burgundians create a kingdom on the banks of the Rhone

Re: Event of the Year
 

442

The Romans conclude a treaty with Geiseric, acknowledging the conquests of the Vandal nation in North Africa.