866

Years: 862 863 864 865 - 866 - 867 868 869 870
Decades: 830s 840s 850s - 860s - 870s 880s 890s
Centuries: 8th century - 9th century - 10th century

Events

Fujiwara no Yoshifusa becomes regent of Japan, starting the Fujiwara regentship.
Alfonso III succeeds as king of Asturias.
Louis II beats the Saracen invaders in Italy.
Ivar the Boneless crosses over to England and beats and captures king Ella of Northumbria, thus revenging his father Ragnar Lodbrok.
Ethelred succeeds as king of Wessex (or 865).
Pope Nicholas I forbids the use of torture in prosecutions for witchcraft.
A "great Viking army" captures York.
Harold Fairhair (850-933) wins a decisive battle in his quest to become king of all of Norway