William Belknap

William Worth Belknap was a lawyer, Union Army officer, government administrator in Iowa, and the 30th United States secretary of war, serving under President Ulysses S. Grant. Belknap was impeached on March 2, 1876, for his role in the trader post scandal but was acquitted by the Senate. Belknap was the first cabinet secretary in U.S. history to be impeached.