![Jonathan Letterman](https://www.historynet.com/wp-content/uploads/2021/09/ACWP-210900-LIFEANDLIMB-02-4c.jpeg)
Though not a West Point graduate, Letterman, from 1849 on, spent most of his career with the U.S. Army. (Library of Congress)
Library of Congress
Though not a West Point graduate, Letterman, from 1849 on, spent most of his career with the U.S. Army. (Library of Congress)
Library of Congress