ORDER OF BATTLE // October 28, 1818
Battle of Arroyo Grande
Estimated force strength by side, with confidence labels per surviving record.
Forces engaged
1 sides catalogued · combined 4,000 estimated
United Kingdom of Portugal, Brazil and the Algarves
4,000
Medium-confidence figure
Battle context
The Battle of Arroyo Grande, fought during the Portuguese Conquest of the Banda Oriental, brought forces of the United Kingdom of Portugal, Brazil and the Algarves under Bento Manuel Ribeiro against Federal League troops under Fructuoso Rivera. Portuguese forces fielded approximately 4,000 troops, and Federal League casualties reached around 100. Beyond these figures, the recorded outcome and its operational consequences within the broader Portuguese campaign to subjugate the Banda Oriental are not documented in available sources.
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