CASUALTY RECORD // August 20, 1512
Battle of Saint-Mathieu
Estimated casualties — killed, wounded, captured, and missing — by side, with confidence labels per surviving record.
Casualties by side
1 sides catalogued · combined 1,230 estimated
France
1,230
Medium-confidence figure
Battle context
The Battle of Saint-Mathieu, fought near Brest between an English fleet under Sir Edward Howard and a Franco-Breton fleet under René de Clermont, was one of only two full-scale naval engagements conducted by Henry VIII's Tudor navy during the War of the League of Cambrai, the other being the later Battle of the Solent. The engagement is notable for the destruction of both fleets' largest and most powerful vessels — the English Regent and the French Marie-la-Cordelière — in a single catastrophic explosion aboard the latter, a loss that cost the French 1,230 casualties. The battle is also cited as a possible early instance of cannon fire through gun ports, though the overview notes this played only a minor role in the fighting. The simultaneous loss of both flagships gave the engagement an outsized material and symbolic weight relative to its place in the broader Italian Wars context of the League of Cambrai conflict.
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