Post-war photograph of Orlando B. Willcox c.1890. Detroit. Cadet Military Academy West Point 1843. Second Lieutenant Fourth U.S. Artillery July 1 1847. First Lieutenant April 30 1850. Resigned Sept. 10 1847. Entered the volunteer service in the First Infantry as Colonel April 24 1861 at Detroit for 3 months age 38. Commissioned and mustered May 1 1861. Wounded and taken prisoner at battle of Bull Run Va. July 21 1861. Exchanged Aug. 17 1862. Appointed Brigadier General to date July 21 1861. Mustered out and honorably discharged Aug. 16 1862 the date of his arrival within the Union lines subsequent to his exchange as prisoner of war. Breveted Major General U.S. Volunteers Aug. 1 1864 'for distinguished and gallant service in the several actions since crossing the Rapidan.' Mustered out and honorably discharged Jan. 15 1866. Commissioned Colonel Twenty-ninth U.S. Infantry July 28 1866. Breveted Brigadier General U.S.A. March 2 1867. Major General Volunteers Aug. 1 1864 for distinguished services in the several actions since crossing the Rapidan. Retired April 16 1887 (Descriptive Roll First Michigan Volunteers).