BUCHANAN, Robert Christie, soldier, born in Maryland about 1810; died in Washington, District of Columbia, 29 November, 1878. He was appointed to the United States military academy from the District of Columbia, and after his graduation in 1830 served as lieutenant in the Black Hawk and Seminole wars. He was made captain on 1 November, 1838, and in the war with Mexico took part in numerous battles. He was brevetted major, 9 May, 1846, commanded a battalion of Maryland volunteers from 25 November, 1846, till 30 May, 1847, and brevetted lieutenant colonel, 8 September, 1847, for services at Molino del Rey. He was made major in the 4th infantry, 3 February, 1855, served against hostile Indians and in various positions until the beginning of the civil war, when he became lieutenant colonel of his regiment and stationed in the defenses of Washington from November, 1861, till March, 1862. He had command of his regiment in the army of the Potomac during the peninsular campaign, and afterward of a brigade of infantry. He was engaged in the siege of Yorktown and in the battles of Gaines's Mills, Glendale, and Nalvern Hill, and made brevet colonel 27 June, 1862. He took part in the second battle of Bull Run and in the Maryland and Rappahannock campaign, in November, 1862, was appointed brigadier-general of volunteers, and in March, 1863, was placed in command of Fort Delaware. In February, 1864, he was promoted to the rank of colonel of the 1st infantry, which regiment he commanded at New Orleans from December, 1864, till August, 1865. In March, 1865, he was made brevet brigadier-general of the United States army for gallant conduct at Malvern Hill, and brevet major general for services at Manassas and Fredericksburg. He commanded the district of Louisiana from January, 1868, till January, 1869, and on 31 December, 1870, was retired, on his own application, after thirty years of consecutive service. When retired he was in command of Fort Porter, New York