Juan Manuel de Rosas (born Juan Manuel José Domingo Ortiz de Rozas y López de Osornio, 1793-1877) was a conservative
Argentine politician who ruled Argentina from 1829 to 1852. Rosas was one of the first famous
caudillos in
Latin America. Rosas came on to the national scene as a powerful cattle rancher. He controlled the cattle frontier
pampa of Argentina, allowing him to rule over the capital,
Buenos Aires. Rosas defeated the European expeditionary forces in 1820 with the help of
gauchos. In 1829, Rosas became governor of
Buenos Aires. In subsequent years, Rosas went in and out of power, but remained a strong leader. During his years out of office (1832-1835), Rosas waged a military campaign against the indigenous population in southern Argentina.
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