List of 871 Major News Events in History, Most Important Historical Events in 871
| Date | Event |
|---|---|
| January 4, 871 | Battle of Reading: Æthelred of Wessex and his brother Alfred are defeated by a Danish invasion army. |
| January 8, 871 | Æthelred I and Alfred the Great lead a West Saxon army to repel an invasion by Danelaw Vikings. |
| January 22, 871 | Battle of Basing: The West Saxons led by King Æthelred I are defeated by the Danelaw Vikings at Basing. |
| March 22, 871 | Æthelred of Wessex is defeated by a Danish invasion army at the Battle of Marton. |