It was marked by the death of Robert the Strong, the Neustrian margrave, and Ranulf I, the duke of Aquitaine.

In 866, Salomon, Duke of Brittany, allied with Hastein (Hasting), a Danish chieftain, for an expedition into Anjou, Maine, and Touraine.

Robert, commander of the afflicted regions, assembled a large army to expel them.

The Frankish army succeeded in intercepting the Danes before they reached their boats on the river Loire.

During the ensuing battle, Robert was killed, Ranulf mortally wounded by an arrow, and Hervé injured.