As viceroy, Pedro de Toledo introduced the papel sellado (literally, sealed paper). He expanded the naval forces and fortified the ports of Valdivia, Valparaíso, Arica and Callao.
Pedro de Toledo, as viceroy, introduced the sealed paper system. He also expanded the navy and fortified key coastal cities like Valdivia, Valparaíso, Arica, and Callao.