Calfucurá also known as Juan Calfucurá or Cufulcurá (b. late 1770s; d. 1873), was a leading Mapuche lonco and military figure in Patagonia in the 19th century. He crossed the Andes from Chile to the Pampas around 1830 after a call from the governor of Buenos Aires, Juan Manuel de Rosas, to fight the Boroanos tribe. Calfucurá succeeded in ending the military power of the Boroanos when he massacred a large part of them in 1834 during a meeting for trade. In 1859 he attacked Bahía Blanca in Argentina with 3,000 warriors.