The Life of the Notorious Civil War General Dan Sickles. Then Congressman Sickles murdered his wife's lover in sight of the White House but was acquitted; went on to a brave record in the Union Army. At Gettysburg he was wounded by a cannon ball and had a leg amputated. In 1864, he was the leading Democrat for Lincoln. He had begun his career as a South appeasing Democrat of Tammany Hall in New York City. A fascinating read.