The Riograndense Republic is proclaimed by rebels after defeating Empire of Brazil's troops in the Battle of Seival, during the Ragamuffin War.

The Riograndense Republic, often called the Piratini Republic, was a de facto state that seceded from the Empire of Brazil and roughly coincided with the present state of Rio Grande do Sul. It was proclaimed on 11 September 1836 by general Antônio de Sousa Neto as a direct consequence of the…