 The Tullahoma campaign, led by William Rosecrans, drove the Confederates from Middle Tennessee so quickly that they did not take many casualties, and were strong enough to defeat Rosecrans soon afterwards.At Nashville in December 1864, George Thomas routed the Army of Tennessee under John Bell Hood, the last major battle fought in the state.The military governor of Tennessee was Andrew Johnson, selected by Lincoln as a Southerner to balance the ticket in the 1864 general election.