Succession
Succeeds his half brother Oswald & becomes the 7th "Bretwalda". Succeeds as King of Bernicia
Role range: 0642-0670
Historical biography archive · Updated 2026-11-03
Oswy Biography and Timeline
Follow Oswy through 20 dated historical records for England.
Oswy, historical timeline
A chronological timeline drawn from matching World History Database records.
20Distinct records
1 of 1Page
641–670Years on this page
641
Rule of Bernicia
After Maserfeld Northumbria divides, Oswine rules Deira & Oswy rules Bernicia
Role range: 0642-0670
642
Rule of Bernicia
Oswy succeeds to Bernicia & Oswine to Deira
Role range: 0642-0670
Succession
After Pendas defeat of Oswald Northumbria is again divided into Deira & Bernicia
Role range: 0642-0670
654
Invasion of Bernicia
Penda wants to destroy Bernicia & joins forces with Aethelhere & Cadafael
Role range: 0642-0670
Invasion of Bernicia
Oswy sues for peace but Penda refuses
Role range: 0642-0671
655
Battle of Winwaed
Defeats & kills Penda of Mercia. Becomes Bretwalda & King of a reunited Northumbria & becomes overlord of Mercia
Role range: 0641-0670
Rule of Mercia
Becomes overlord of Mercia after the Battle of Winwaed
Role range: 0641-0670
Unification
Reunifies Northumbria after the Battle of Winwaed
Role range: 0641-0670
656
Result of Surrender of Mercian Nobles
Mercian nobles acknowledge Oswy's overlordship, extending his authority over Mercia.
Role range: 0641-0670
Rule of Mercia
Mercian nobles submit to Oswy & acknowledge him as their overlord
Role range: 0641-0670
Succession
Mercian nobles conceal Wulfere who becomes King of the Mercians & Middle Angles
Role range: 0641-0670
Surrender of Mercian Nobles
Mercian nobles submit to Oswy & acknowledge him as their overlord
Role range: 0641-0670
664
Conversion
Decides in favor of the Roman teachings put forward by priest Wilfrid
Role range: 0642-0670
Conference of Whitby
The Conference of Whitby agrees on the Supremacy of the Roman Church over Britain. The Conference agrees on the Supremacy of the Roman Church over Britain. The Church throughout all the English Kingdoms unites under one primate. Chairs the Conference of Whitby
Role range: 0641-0670
Conversion
Ends differences between Irish & Roman missionaries over the date of Easter
Role range: 0642-0670
Easter
Ends differences between Irish & Roman missionaries over the date of Easter
Role range: 0642-0670
Supremacy
The Conference of Whitby agrees on the Supremacy of the Roman Church over Britain
Role range: 0641-0670
Supremacy
The Conference of Whitby agrees on the Supremacy of the Roman Church over Britain. The Conference agrees on the Supremacy of the Roman Church over Britain. The Church throughout all the English Kingdoms unites under one primate. Chairs the Conference of Whitby
Role range: 0641-0670
670
Death of Oswy
Death of Oswy, Mercia reasserts itself as a power
Role range: 0641-0670
Records, sources and methodology
These dates and descriptions come from the historical_events database. Exact duplicate records have been collapsed. Names are grouped by the country, Name 2 and Name 1 fields; records with missing Name 2 cannot be reliably assigned to an individual biography. Check the underlying sources before formal citation.