The Army of Arauco (Spanish: Ejército de Arauco) was a professional army in the service of the kings of Spain that was based in Spanish-Mapuche frontier, south-central Chile, during the 16th to 19th centuries. It was notable for being a rare example of a standing army in the Americas. The army was established after the disastrous Destruction of the Seven Cities (1598–1604) to fight in the Arauco War against anti-Spanish Mapuche coalitions. The army was financed by silver from Potosí, in a payment called Real Situado. With the army headquarters being in Concepción this city became the "military capital" of Chile.