João Carlos de Saldanha Oliveira e Daun, 1st Duke of Saldanha (1790-1876), was a prominent Portuguese military leader and politician. He played a significant role in the Liberal Wars, which were fought between liberal and conservative factions in Portugal during the 19th century. Saldanha was known for his strategic skills and leadership, which helped shape the political landscape of Portugal. In addition to his military career, Saldanha served multiple terms as Prime Minister of Portugal. He was a key figure in the establishment of a constitutional monarchy in the country. His contributions to Portuguese history are recognized, and he remains a notable figure in the context of the Liberal Wars and Portuguese politics.