A few rarely seen photographs of ACW generals at a younger age. First Lieutenant Abner Doubleday of future Civil War and mistakenly baseball fame posing with Mexican civilians during the Mexican-American War, near Saltillo, c. 1847. One of the few photographs from the Mexican-American War that features an identifiable person. The man in the photo above is believed to be 2nd Lt. Thomas J. Jackson in Mexico City or Vera Cruz while serving with the 1st U.S. Artillery Regiment, circa 1847. Another photograph of 2nd Lt. Jackson. Lieutenant Ulysses S. Grant (left) and his friend Alexander Hays at Camp Salubrity, Louisiana, 1845.