In 1810, a movement for independence broke out in Buenos Aires and it influenced the move for independence in Banda Oriental. In 1811, General José Gervasio Artigas led the independence movement in Banda Oriental and raised an army and fought against Spanish troops in the territory. In May 1811, General Artigas fought a successful battle against Spanish troops known as the Battle of Las Piedras. General Artigas was later seen as a threat by commanders in Buenos Aires who saw the Banda Oriental as a province of Rio de la Plata and not as a separate territory. In 1820, the commanders of Buenos Aires acquiesced when Portuguese Brazilian forces took over the Banda Oriental and forced Artigas into exile.