CHAPMAN, William, soldier, born in St. Johns, Maryland, 22 January, 1810. He was graduated at the United States military academy in 1831, and promoted to lieutenant in the 5th infantry, after which he served on frontier duty at Fort Mackinac, Michigan, in 1831-'2, on the Black Hawk expedition in 1832, as instructor at West Point in 1832-'3, and with his regiment at various posts on the frontier until 1845. In 1845-'6 he was in Texas during the military occupancy of that country, and in the Mexican war was present at the principal engagements. He received the brevet rank of major in August, 1847, and that of lieutenant colonel in September, for gallant conduct during the war. Subsequently he again served on garrison duty in Texas and New Mexico, becoming major of the 2d infantry in February, 1861. During" the civil war he had command of a regiment in the defenses of Washington in 1862, and was with the Army of the Potomac during the peninsular campaign, being engaged in the siege of Yorktown and at Malvern Hill, and afterward at Manassas, where he received the brevet of colonel. He was retired from active service in August, 1863, with the rank of lieutenant colonel, and assigned to the command of the draft rendezvous at Madison, Wisconsin