The First Cevallos expedition was a military action between September 1762 and April 1763, by the Spanish forces led by Don Pedro Antonio de Cevallos, Governor of Buenos Aires, against the Portuguese in the Banda Oriental as part of the Seven Years' War. The Portuguese territories of Colonia del Sacramento were conquered by the Spaniards and the Anglo-Portuguese forces were defeated and forced to surrender and retreat. The Colonia of Sacramento and the near territories were under Spanish control until the Treaty of Paris (1763).