Confederate Major General, Civil War. An attorney in Canton, Mississippi, Tupper served from 1844 until 1846 as Quartermaster, Mississippi Militia, Third Division, and later served as a member of the Committee of Three, advisory committee to the Governor in the years immediately preceding the Civil War. After the war began, Tupper was named Major General of the Mississippi troops but resigned from the position on March 17, 1863, writing the following in his letter of resignation: "I have deemed it my duty, under existing circumstances, to resign the office of Major General of the Militia and Volunteer forces of Mississippi. As I do not wish to remain out of the service, but wish to aid to the utmost of my endeavors in the achievement of our independence, I tender you my services in any capacity in which you may desire them available." Tupper was quite active in the Masons, elected Grand High Priest of the Grand Lodge of Mississippi in 1850 and Thrice Illustrious Grand Master in 1854.