William Henry Seward was an American politician who served as United States Secretary of State from 1861 to 1869 and earlier served as governor of New York and as a United States senator. A determined opponent of the spread of slavery in the years leading up to the American Civil War, he was prominent in the Republican Party in its formative years and was praised for his work on behalf of the Union as Secretary of State during the Civil War. He also negotiated the treaty for the United States to purchase the Alaska Territory. Born: May 16, 1801 Died: October 10, 1872 In office: March 5, 1861 – March 4, 1869 Wiki link