CASUALTY RECORD // September 25, 1812
Battle of Tucumán
Estimated casualties — killed, wounded, captured, and missing — by side, with confidence labels per surviving record.
Casualties by side
2 sides catalogued · combined 650–890 estimated
Provinces-Unies du Río de la Plata
200
Medium-confidence figure
Espagne
450–690
Medium-confidence figure
Battle context
The Battle of Tucumán on 24–25 September 1812 halted the royalist advance into Argentina's northwest, where General Juan Pío de Tristán's force of roughly 3,000 outnumbered Manuel Belgrano's Army of the North by nearly two to one. Belgrano's defeat of Tristán prevented the Viceroyalty of Peru from pushing deeper into the United Provinces and secured a critical buffer in the interior. Together with the subsequent victory at Salta in February 1813, Tucumán allowed the United Provinces to reaffirm and consolidate the borders under their control, stabilizing the northwestern front during a formative period of the Argentine War of Independence.
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