Battle of La Roche-Derrien

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Battle of La Roche-Derrien
Part of the War of the Breton Succession
Charles de Blois, Duke of Brittany, is taken prisoner after the battle of La Roche-Derrien
Date 1347, during the night Location La Roche-Derrien, France Result Anglo-Breton victory
Belligerents
House of Montfort, Brittany Kingdom of England	House of Blois, Brittany Kingdom of France
Commanders and leaders
Thomas Dagworth	Charles of Blois  (POW)
Strength
1,000	4,000–5,000
Casualties and losses
Unknown	Unknown

The Battle of La Roche-Derrien was one of the battles of the Breton War of Succession; it was fought on 20 June 1347 during the night between Anglo-Breton and Franco-Breton forces. Approximately 4,000–5,000 French, Breton and Genoese mercenaries (the largest field army ever assembled by Charles of Blois) laid siege to the town of La Roche-Derrien in the hope of luring Sir Thomas Dagworth, the commander of the only standing English field army in Brittany at the time, into an open pitched battle.