Succession
Succeeds as King of Mercia, brother of Wulfhere
Role range: 0674-0704
Historical biography archive · Updated 2026-11-03
Aethelred I Biography and Timeline
Follow Aethelred I through 14 dated historical records for England.
Aethelred I, historical timeline
A chronological timeline drawn from matching World History Database records.
14Distinct records
1 of 1Page
674–871Years on this page
674
790
Succession
Succeeds as King of Northumbria
Role range: 0674-0704
796
Assassination of Aethelred I
Aethelred I is assassinated
Role range: 0674-0704
Death of Aethelred I
Death of Aethelred I, assassinated
Role range: 0674-0704
865
Succession
Succeeds as King of Wessex, Aethelberts brother
Role range: 0674-0704
866
Great Army
The "Great Army" of the Danes lands in East Anglia
Role range: 0674-0704
Invasion of England
The "Great Army" of the Danes lands in East Anglia
Role range: 0674-0704
868
Campaign at Nottingham
Aethelred marched with Alfred to support Mercia, but the campaign ended through negotiation.
Role range: 0865-0871
871
Battle of Ashdown
Leads an assault on 2 Danish Kings, Healfdene & Bagsecg. Kills King Bagsecg & drives away the "great army"
Role range: 0674-0704
Death of Aethelred I
Kills King Bagsecg at the Battle of Ashdown
Role range: 0674-0704
Great Army
Kills King Bagsecg & drives away the "great army"
Role range: 0674-0704
Death of Aethelred I
Death of Aethelred I, killed at the Battle of Reading
Role range: 0865-0871
Battle of Merton
Defeated & killed in battle by the Danes
Role range: 0674-0704
Battle of Reading
Killed at the Battle of Reading. A camp is set up & the Saxon army joins Aethelwulf but he is killed by the Danes
Role range: 0865-0871
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.