William Longsword of Normandy was ambushed and assassinated by supporters of Arnulf I, Count of Flanders, while both were at a peace conference to settle their differences.

Count of Normandy from 927 to 942

William Longsword was the second ruler of Normandy, from 927 until his assassination in 942.

Geographical and cultural region of France

Normandy is a geographical and cultural region in northwestern Europe, roughly coextensive with the historical Duchy of Normandy.

Count of Flanders from 918 to 964

Arnulf I, called "the Great", was the first Count of Flanders.

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