GRAYSON, John Breckenridge, soldier, born in Kentucky in 1807; died in Florida in 1862. He was graduated at the United States military academy in 1826, serving in the artillery-school for practice at Fortress Monroe till 4 June, 1828, and was then on topographical duty till 29 March, 1832. He was on duty in various forts and garrisons until 1835, became 1st lieutenant, 30 April, 1834, served in the Seminole war in 1835-'6, and on commissary duty at New Orleans in 1836-'47. He was promoted to a captaincy, 11 December 1838, and served in the Mexican war in 1847-'8, as chief of commissariat of the army under General Scott. He was at Vera Cruz, Cerro Gordo, Churubusco, where he was brevetted major, Molino del Rey. Chapultepee, where he was brevetted lieutenant colonel, and at the assault and capture of the City of Mexico. On his return to the United States he was assigned to commissary duty at Detroit, Michigan, was promoted major, 21 October, 1852, and made chief of the commissariat of the department of New Mexico till 1861. He resigned his commission on I July, 1861, and joined the Confederate army.