The Duke of Saldanha was a prominent Portuguese military leader and politician in the 19th century. Born in 1790, his full name was João Carlos de Saldanha Oliveira e Daun, and he played a significant role in the Liberal Wars in Portugal. He served as Prime Minister multiple times and was known for his efforts to modernize the Portuguese military and government. Saldanha was also involved in international diplomacy, representing Portugal in various European affairs. He was made a Duke in recognition of his contributions to the nation. His legacy includes a focus on military reform and the promotion of liberal ideals in Portugal.