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BATTLE // June 8, 1758

Siege of Louisbourg

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Overview

The siege of Louisbourg was fought during the Seven Years' War on Cape Breton Island between an attacking British force and defending French and Mi'kmaq troops. The French attempted to send reinforcements by sea, but were not able to as the fleet was blockaded and defeated by the British. The battle ended French colonial dominance in Atlantic Canada and led to the subsequent British campaign to capture Quebec in 1759 and the remainder of New France the following year.

Overview adapted from Wikipedia, licensed under CC BY-SA 4.0.

Significance

The Siege of Louisbourg brought a British force of 26,000 under Jeffery Amherst and Edward Boscawen against a French garrison of 7,000 under Augustin Drucour, resulting in French casualties of 6,600. The scale of the disparity in forces and the near-total attrition of the French garrison indicate a decisive British capture of the fortress. Louisbourg, situated to guard the entrance to the Gulf of St. Lawrence, was strategically critical to French control of Canada; its fall opened the river approach to Quebec and the interior of New France. The engagement involved a notable concentration of commanders who would go on to shape subsequent operations in the French and Indian War, including James Wolfe, whose role here preceded his command at the Battle of the Plains of Abraham the following year.

Forces & casualties

Troop strength

  • Great Britain26,000
    medium
  • France7,000
    medium

Great Britain fielded a 3.7 : 1 numerical advantage

Casualties

  • France6,600
    medium94% loss rate

Commanders (8)

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2 sibling battles · 0 factions

Last verified July 2026
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