Alexander P. Stewart
Alexander Peter Stewart was a career United States Army officer, college professor, and a general in the Confederate States Army during the American Civil War.
Stewart was born in Rogersville, Tennessee. He graduated from the United States Military Academy in 1842 and was commissioned a second lieutenant in the 3rd U.S. Artillery. He resigned his commission on May 31, 1845 to become a professor of mathematics and experimental philosophy at Cumberland University in Lebanon, Tennessee, and later attained the same position at the University of Nashville.
Source: Wikipedia