Meridian, Mississippi, intended to disrupt Confederate infrastructure and communications. Sherman's army captured the city of Meridian on February 14 and proceeded to destroy 105 miles of railroad and 61 bridges, while burning at least 10 locomotives and 28 railcars. The army took 4,000 prisoners and commandeered many wagons and horses. Thousands of refugees, both black and white, joined Sherman's columns, which on February 20 finally withdrew towards Canton. Atlanta The Meridian campaign marked the end of Sherman's brief tenure as commander of the Army of the Tennessee. Sherman had, up to that point, achieved mixed success as a general, and controversy attached especially to his performance at Chattanooga. However, he enjoyed Grant's confidence and friendship. When Lincoln called Grant east in the spring of 1864 to take command of all the Union armies, Grant appointed Sherman (by then known to his soldiers as "Uncle Billy") to succeed him as head of the Military Division of the Mississippi, which entailed command of Union troops in the Western Theater of the war. As Grant took overall command of the armies of the United States, Sherman wrote to him outlining his strategy to bring the war to an end: "If you can whip Lee and I can march to the Atlantic I think ol' Uncle Abe [Lincoln] will give us twenty days leave to see the young folks." Sherman proceeded to invade the state of Georgia with three armies: the 60,000-strong Army of the Cumberland under Thomas, the 25,000-strong Army of the Tennessee under James B. McPherson, and the 13,000-strong Army of the Ohio under John M. Schofield. He conducted a series of flanking maneuvers through rugged terrain against Confederate general Joseph E. Johnston's Army of Tennessee, attempting a direct assault only at the Battle of Kennesaw Mountain. The Confederate victory at Kennesaw Mountain did little to halt Sherman's advance towards Atlanta. In July, the cautious Johnston was replaced by the more aggressive John Bell Hood, who played to Sherman's strength by challenging him to direct battles on open ground. Meanwhile, in August, Sherman "learned that I had been commissioned a major-general in the regular army, which was unexpected, and not desired until successful in the capture of Atlanta". Sherman's Atlanta campaign concluded successfully on September 2, 1864, with the capture of the city, which Hood had been forced to abandon. After ordering almost all civilians to abandon the city in September, Sherman