Rodrigo Pinto Guedes, 1st Baron do Rio da Prata was a naval officer who served in the admiralties of the Kingdom of Portugal, its successor the United Kingdom of Portugal, Brazil and the Algarves, and finally the Empire of Brazil, for which he acted as commander of all naval operations during the Cisplatine War.
Career
Guedes was born on July 27, 1762 in Aguiar da Beira, Gradiz, Portugal to Rodrigo Pinto Guedes and Maria da Silveira Pereira. In September 1781, he was named a Cadet of the Portuguese Navy, and thus began what would prove to be a successful career.