Thomas J. "Stonewall" Jackson arrived at West Point unprepared and uneducated. He failed his first entrance exam. A loner, he worked diligently to improve his class ranking and graduated 17th. in the Class of 1846. His worst grades, like U.S. Grant's, in infantry tactics.
Thomas Stonewall Jackson, by Matthew Brady c. 1851. National Archives. It may be an understatement to suggest that the war was not good to Stonewall, here he is in 1863. He was mortally wounded at the Battle of Chancellorsville later that year.