1797-1863 1817-1876 1818-1893 1820-1891 1825-1875 1831-1879 1864 19thcentury artilleryoperations atlantacampaign biography braxton campaigns casestudies commandoftroops confederatestatesofamerica generals history hood johnbell johnston military militaryartandscience militaryleadershipbeauregard militaryleadershipbragg militaryleadershipjohnston militaryleadershippickett militaryleadershipsumner sherman unitedstates