Reddick, James M., born in Preble County, Ohio; Feb. 25, 1862 enlisted at St. Joseph, Mo. as private, Company L, 1st Mo. State Militia Cavalry Rgt. March 14, 1865 mustered out.
1876 applied for a pension (application #212368/certificate #423004)
June 1899 his widow Amanda Reddick applied for a pension while living in Indian Territory (Okla.)
At time of enlistment Reddick was single, farmer living at Rochester, Andrew County, Mo. He was five feet, 10 inches tall, had dark hair and blue eyes
Sources: Pension Index; Missouri Muster Rolls

His age at enlistment given as 19 (c.1843 born) but that is the only piece of information that does not match the information you have