Henry G.A. Caspers was corporal, later promoted to sergeant, in the artillery company of Capt. Fischer, organized in St. Louis, Missouri. At Ft. Leavenworth, Kansas, the company was mustered into the service of Col. Kearney. Most of Casper's military service was served in and around Santa Fe, New Mexico, during the time of the Mexican War. This journal dates from June 13, 1846 - December 1848