MAYNADIER, William, soldier, born in Maryland in 1806; died in Washington, D. C., 3 July, 1871. He was graduated at the United States military academy in 1827. became 1st lieutenant in 1832, captain in 1838, major and lieutenant-colonel in 1861, colonel in 1863, and brevet brigadier-general in 1865. He was aide to General Winfield Scott in the Black Hawk war, and on similar duty under General Alexander Macomb during the early part of the Florida war. He was frequently assigned to ordnance duty while in the artillery, and in 1838, on the increase of that corps, became captain of ordnance, and was assigned to the Pikeville, Maryland, arsenal, where he was in command, acting also as chief of ordnance till 1842, when he became principal assistant to the chief of ordnance. From this date he was closely associated in official connection with the successive chiefs of the ordnance bureau, by whom he was greatly valued for his ability and long experience. He was charged and acquitted in 1862 of disloyalty, as accessory to the alleged attempt of See. John B. Floyd to transfer United States cannon, munition, and arms to the south. In 1864 he was inspector of arsenals and depots.