Battle of Arroyo Grande (1818)

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Battle of Arroyo Grande
Part of Portuguese conquest of the Banda Oriental
Date 28th October 1818
Location Arroyo Grande, Uruguay
Result Portuguese victory
Annexation of Uruguay by Portugal
Flag of the United Kingdom of Portugal, Brazil, and the Algarves.svg United Kingdom of Portugal, Brazil and the Algarves Banda Oriental
Commanders and leaders
Bento Manuel Ribeiro Fructuoso Rivera
4000 men Unknown
Casualties and losses
Unknown circa 100

The Battle of Arroyo Grande was a battle between the Portuguese forces under Bento Manuel Ribeiro, and the Artiguist forces of Fructuoso Rivera in Arroyo Grande, modern-day Uruguay. The Portuguese were completely victorious.


After the Portuguese success in Arroyo Grande, great numbers of Artiguist soldiers and officers defected and joined the Portuguese, due to Portugal's promise of forgiveness and mercy. This, together with the battle itself, was a severe blow to Artigas' war effort.