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CASUALTY RECORD // June 8, 1758

Siege of Louisbourg

Estimated casualties — killed, wounded, captured, and missing — by side, with confidence labels per surviving record.

Casualties by side

1 sides catalogued · combined 6,600 estimated

  • France

    6,600

    Medium-confidence figure

Battle context

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.

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Last verified July 2026
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