Atlas of Battles

battle, medieval

Battle of Mortemer

Battle of Mortemer was a battle fought in 1054 at Mortemer, in what is now France. The recorded result: Norman victory.

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Duke William the Bastard defeating the French, and Duke William sending a herald to Henry I of France. (British Library, Royal 16 G VI f. 266v)
Duke William the Bastard defeating the French, and Duke William sending a herald to Henry I of France. (British Library, Royal 16 G VI f. 266v). Chroniques de Saint-Denis, Public domain, via Wikimedia Commons.
Fought1054
WhereMortemer, France49.752N, 1.551E
OutcomeNorman victory
BelligerentsKingdom of FranceagainstDuchy of Normandy

Record

Date1054 (year precision)
PlaceMortemer, France
49.752N, 1.551E
KindBattle, medieval
Commanders
  • Robert II of France
  • Guy I, Count of Ponthieu
  • Robert, Count of Eu
  • Walter Giffard, Lord of Longueville
  • Roger of Mortemer
  • William de Warenne, 1st Earl of Surrey
Battle of MortemerBattle of MortemerBattle of GerberoySiege of GerberoyBattle of ArquesBattle of Saucourt-en-VimeuBattle of Mons-en-VimeuBattle of GerberoySiege of GerberoyBattle of ArquesBattle of Saucourt-en-VimeuBattle of Mons-en-VimeuLe HavreLilleRouenBrightonReimsCaenAmiensCalais100 km49.752N, 1.551E
The recorded site, with the nearest other engagements in the atlas. Present-day coastlines, rivers and borders; towns from Natural Earth.

Nearest engagements

Elsewhere in 1054

Battle of Mortemer is one of 318 engagements of the 11th century in the atlas and one of 1,383 in present-day France.

Sources

Identity, coordinates, dates and the war from Wikidata Q68371, released under CC0. Result, belligerents, commanders, strength and casualties from the infobox of the English Wikipedia article Battle of Mortemer, revision 1370269896, read 2026-11-14, licensed CC BY-SA 4.0; the article's text is not reproduced here. Present-day country and state from Natural Earth. Dates before 1582 follow the Julian calendar as recorded.