MANSON, Mahlon D., soldier, born in Piqua, Miami County, Ohio, 20 February, 1820. He received a common-school education, studied pharmacy, and settled in Crawfordsville, Indiana. He served during the Mexican war as captain of the 5th Indiana volunteers, sat in the legislature in 1851-'2, and, enlisting as a private at the beginning of the civil war, was at once made colonel of the 10th Indiana regiment, which he commanded at the battle of Rich Mountain, West Virginia, in July, 1861. He led the 2d brigade, 1st, division, of the Army of the Ohio into action at Mill Springs, Kentucky, in January, 1862, and was appointed brigadier-general of volunteers in the following March. In August of the same year he commanded the National forces at Richmond, Kentucky, where he was wounded and taken prisoner, but was exchanged in December. He was a again in command during the Morgan raid in Indiana and Ohio in July, 1863, and in September was placed at the head of the 23d army corps. He took part in the siege of Knoxville, Tennessee, and in various engagements in that state. He was severely wounded at the battle of Resaca and compelled to resign. On his return home, after being nominated as lieutenant-governor and secretary of state, he was elected to congress as a Democrat, serving from 4 March, 1871, till 3 March, 1873.