Casimiro Biguá was a 19th-century Tehuelchecacique in Patagonia. He opposed the Chilean colonization of the Strait of Magellan and in the 1860s he entered an alliance with Argentine authorities. In a bid to establish Argentine sovereignty over the strait Argentine "ad-hoc agent" Luis Piedra Buena brought Biguá to Buenos Aires where met President Bartolomé Mitre and was declared lieutenant colonel of the Argentine Army and granted a salary accordingly.[1] In 1866 he signed a treaty with Argentine authorities where the Tehuelche were recognized as Argentine citizens and Argentine sovereignty up to the strait of Magellan was declared.[2] The influence of Casimiro Biguá in political affairs declined in the late 1860s.[2]
He was known for his deference to English travellers and sea-farers.[3]
