| Battle of Mortemer | |||||||
|---|---|---|---|---|---|---|---|
 Depiction of the battle from a 14th Century parchment | |||||||
| |||||||
| Belligerents | |||||||
| Kingdom of France | Duchy of Normandy | ||||||
| Commanders and leaders | |||||||
|
Odo of France (POW) Renaud, Count of Clermont Guy, Count of Ponthieu (POW) Waleran of Ponthieu † |
Robert, Count of Eu Hugh of Gournay Walter Giffard Roger of Mortemer William de Warenne | ||||||
The Battle of Mortemer was a defeat for Henry I of France when he led an army against his vassal, William the Bastard, Duke of Normandy[a] in 1054. William was eventually to become known as William the Conqueror after his successful invasion and conquest of England.
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