Minas Geraes-class battleship

Two Minas Geraes-class battleships were built for the Brazilian Navy in the early twentieth century. Named Minas Geraes and São Paulo, these "dreadnought" warships were intended to be Brazil's first step towards becoming an international power, and they consequently initiated a South American naval arms race.

In 1904, Brazil began a major naval building program that included three small battleships. Designing and ordering the ships took two years, but these plans were scrapped after the revolutionary dreadnought concept rendered the Brazilian design obsolete. Two dreadnoughts were instead ordered from the United Kingdom, making Brazil the third country to have ships of this type under construction, before traditional powers like Germany, France, or Russia. As such, the ships created much uncertainty among the major countries in the world, many of whom incorrectly speculated the ships were actually destined for a rival nation. Similarly, they also caused much consternation in Argentina and, consequently, Chile.

Soon after their delivery in 1910, both Minas Geraes and São Paulo were embroiled in the Revolt of the Lash (Revolta da Chibata), in which the Afro-Brazilian crews of four ships demanded the abolition of corporal punishment in the navy. The mutineers surrendered after four days, when a bill was passed granting amnesty to all those involved. In 1922, the two battleships were used to help put down a revolt at Fort Copacabana.