📅 Today in HistoryOctober 8

Constantine I defeats Licinius, who loses his European territories.

The first session of the Council of Chalcedon begins.

Frankish forces led by Louis the Younger prevent a West Frankish invasion and defeat emperor Charles II ("the Bald").

Dmitar Zvonimir is crowned King of Croatia.

Isabella of Angoulême is crowned Queen consort of England.

Mladen II Šubić of Bribir is deposed as the Croatian Ban after the Battle of Bliska.

The Great Stand on the Ugra River puts an end to Tatar rule over Moscow

The Spanish siege of Alkmaar ends with the first Dutch victory in the Eighty Years' War.

Jeanne Mance opens the first lay hospital of North America in Montreal.

The Treaty of Ried is signed between Bavaria and Austria.