Original: William McKinley, Jr. (January 29, 1843 September 14, 1901) was the 25th President of the United States, and the last veteran of the American Civil War to be elected.
Simplified: William McKinley (January 29, 1843 - September 14, 1901) was the 25th President of the United States, from 1897 until his assassination in 1901.