The Battle of Chattanooga

The most famous of the 3 battles of Chattanooga, the second battle of Chatanooga occured on August 16, 1863 and was in Tennesee. Union major general William Rosecrans, who was the chief general of the Army of Cumberland, marched his dvisions to Chattanooga, a small town in Tennesee. Union colonel John Wilder's brigade from the 4th Union division, part of the 14th Union army corps, traveled to a place to the northeast of Chattanooga where the Confederate army could see them, reinforcing major general Braxton Bragg's worries of a Union army assult on the town from that exact direction. On August 21, colonel Wilder's brigade arrived at the Tennesee River on the other side of Chattanooga and commanded the artillery from the 18th Indiana brigade to open fire on the town. The shells got the attention of many soldiers and civilians in town in church observing a day of prayer and fasting. The bombardment sank two steamers docked at the landing and created a great deal of consternation amongst the Confederates.
Continuing periodically over the next two weeks, the shelling helped keep Bragg's attention to the northeast while the bulk of Rosecrans's army crossed the Tennessee River well west and south of Chattanooga. When Bragg learned on September 8 that the Union army was in force southwest of the city, he abandoned Chattanooga and marched his Army of Tennesee into Georgia Bragg's army marched down the LaFayette and camped in the city of

Lafayette. A song called "Chattanooga Choo Choo" was written after this battle.

I found this work on http://en.wikipedia.org/wiki/Second_Battle_of_Chattanooga