Smith, Andrew Jackson was born on April 28, 1815 in Buckingham, Pennsylvania, United States. Son of Samuel and Mistress (Wilkinson) Smith.
Graduated from the United States Military Academy, 1838.
Served in expedition to South Pass of Rocky Mountains, 1840. Commissioned First lieutenant United States Army, 1845, captain, 1847. Major 1st Dragoons, 1861.
Colonel 2d California Cavalry, 1861. Became chief of cavalry under Henry Wager Halleck, 1861, served in Corinth campaign, 1862. Brigadier general United States Volunteers, 1862, commanded div. in Vicksburg campaign, 1863.
Major general United States Volunteers, 1864, defeated Nathan Bedford Forrest at Tupelo, Mississippi, served in Battle of Nashville (Tennessee). Commissioned lieutenant colonel United States Army, 1864. Commander XVI Corps in Mobile campaign, 1865.
Colonel 7th Cavalry, 1866. Postmaster St. Louis, 1869, city auditor, 1877-1889. Commanded militia brigade during strikes in St. Louis, 1877.