ORDER OF BATTLE // August 31, 1813
Battle of San Marcial
Estimated force strength by side, with confidence labels per surviving record.
Forces engaged
2 sides catalogued · combined 34,000 estimated
Spain
16,000
Medium-confidence figure
France
18,000
Medium-confidence figure
Battle context
The Battle of San Marcial, fought near Irún close to the Franco-Spanish border on 31 August 1813, saw the Spanish Army of Galicia under Manuel Freire de Andrade and Gabriel de Mendizábal repulse a French assault commanded by Jean-de-Dieu Soult. The Spanish force of 16,000 held against 18,000 French troops, inflicting roughly 4,000 French casualties while sustaining approximately 2,500 of their own. Coming in the latter stages of the Peninsular War, the successful defense demonstrated the Spanish army's growing capacity to contest French forces independently, without relying on British intervention. Control of the heights of San Marcial reinforced the Allied position along the Franco-Spanish frontier and added pressure on Soult's forces as the campaign moved toward the Pyrenees and ultimately into French territory.
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