The Battle of Arroyo Grande took place between the Luso-Brazilian forces under the command of Bento Manuel Ribeiro, and the Artiguist forces of Fructuoso Rivera in Arroyo Grande, modern-day Uruguay.

The Luso-Brazilian forces were completely victorious.

After the Luso-Brazilian success in Arroyo Grande, a great number of Artiguist soldiers and officers defected and joined them, due to the fact they were promised forgiveness and mercy.

This, together with the battle itself, was a severe blow to Artigas' war effort.

You can help Wikipedia by expanding it.This article about a battle in Uruguayan history is a stub.