The Pincheira brothers was an infamous royalist outlaw group in Chile and Argentina active from 1818 to 1832. The gang fought initially in the Chilean War of Independence as royalist guerrillas during the Guerra a muerte phase. After Vicente Benavides was executed and the royalist resistance collapsed, they became armed bandits who sought to live outside the new states of Chile and Argentina. Later they specialized in cattle raiding and robbery. The Pincheira brothers formed an alliance with the Boroanos tribe that had settled in Salinas Grandes and Sierra de la Ventana and attacked with them Carmen de Patagones and Fortaleza Protectora Argentina. As such they were a multiethnic group.
February 10, 1827: Señor Coronel Buchefe. De lo que prebiene del indulto no podemos porque no somos solos que peliamos pues ustedes saben que el portugues aliado se halla peliando en Buenos ayres i si ustedes gustan invernar invernen que no les hace ningun perjuicio.
Wikipedia https://en.wikipedia.org/wiki/Pincheira_brothers
Address Chile
Coordinates -36°53'50.232" N -71°33'13.05" E