CASUALTY RECORD // July 16, 1866
Battle of Boquerón
Estimated casualties — killed, wounded, captured, and missing — by side, with confidence labels per surviving record.
Casualties by side
2 sides catalogued · combined 3,954 estimated
Empire of Brazil
1,954
Medium-confidence figure
Paraguay
2,000
Medium-confidence figure
Battle context
The Battle of Boquerón was the first major engagement of the Chaco War, fought over the Bolivian-occupied fortín of Boquerón. Bolivian forces had seized the outpost in late July 1932 on orders from President Daniel Salamanca, a move that escalated a border dispute into full-scale war between Bolivia and Paraguay. The battle thus marked the point at which localized frontier tension became open conflict between the two nations.
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