The Battle of Suipacha was fought on 7 November 1810 in Bolivia during the Bolivian War of Independence between the Spanish colonial army and the Republican forces sent by the Primera Junta from Buenos Aires. At the time Bolivia was known as Upper Peru (Alto Perú). It was the first decisive defeat of the Royalists by Republican forces. The battle took place southeast of Tupiza, near the small town of Suipacha, on the margin of the Suipacha river in the Sud Chichas province (Potosí Department in Bolivia).