The Vikings sack the French city of Nantes.

Vikings were active in Brittany during the Middle Ages, even occupying a portion of it for a time. Throughout the 9th century, the Bretons faced threats from various flanks: they resisted full incorporation into the Frankish Carolingian Empire yet they also had to repel an emerging threat of the new duchy of Normandy on their eastern border by these Scandinavian colonists.

June 24 is the 175th day of the year in the Gregorian calendar; 190 days remain until the end of the year.