Calfuleufu
Calfuleufú is associated with the stream later called Arroyo Azul, which crosses the pampas south of the Salado River. Its waters run through open grasslands and a landscape of shallow lagoons and seasonal flooding. In 1832 the government of Buenos Aires established a fort and settlement on the stream as its frontier expanded southward. Indigenous communities continued to inhabit the surrounding plains and negotiate with the advancing authorities.