Battle of the River Idle: King Rædwald of East Anglia kills Æthelfrith of Northumbria, and conquers the Kingdom of Elmet.
619
2 February - Death of Laurence, the second Archbishop of Canterbury. He is succeeded by Mellitus.
624
24 April - Death of Mellitus, the third Archbishop of Canterbury. He is succeeded by Justus, who dies at a date prior to 631 and is succeeded by Honorius.
Battle of Heavenfield (near Hexham): Northumbrian forces led by Oswald of Bernicia decisively defeat the larger forces of Gwynedd under Cadwallon (who is killed). Oswald reunites the kingdoms of Bernicia and Deira under his single rule.
Birinus, the French-born first Bishop of Dorchester, begins the conversion of Wessex to Christianity. King Cynegils of Wessex is baptised at about this time.
20 January - Death of Eadbald of Kent. He is succeeded by his son Eorcenberht.
642
5 August - Battle of Maserfield: King Penda of Mercia kills Oswald of Northumbria and divides his realm. Oswald's brother Oswiu becomes king of Bernicia, subject to Penda.
643
Widsith, the earliest surviving example of English heroic prose, is composed.
March - Deusdedit is consecrated as the first native-born Archbishop of Canterbury.
15 November - Battle of the Winwaed: King Oswiu of Bernicia kills King Penda of Mercia, giving himself rule over all of Northumbria and Mercia. He installs Penda's son Peada as client king of Mercia south of the River Trent. Æthelhere of East Anglia is also killed in the battle and succeeded by his brother Æthelwold.
656
Easter - Peada of Mercia is killed through the treachery of his wife (Oswiu's daughter).
(Between 657 and 659) - Three Mercian leaders, Immin, Eafa and Eadbert, rebel against Northumbrian rule and instal Wulfhere (Peada's brother) as king of all Mercia, its first Christian ruler.
Synod of Whitby: King Oswiu of Northumbria rules that his kingdom will calculate Easter and observe the monastic tonsure according to the customs of Rome rather than those of Celtic Christianity.
14 July
Approximate date - Death of Deusdedit, Archbishop of Canterbury. He is succeeded by Wighard who dies before his consecration and is succeeded by Theodore of Tarsus.
15 February - Oswiu of Northumbria dies. He is succeeded as King of Bernicia by his elder son, Ecgfrith, and as King of Deira by his younger son, Ælfwine.
