Chattanooga

On September 20, 1863, the Civil War Battle of Chickamauga near Chattanooga, Tennessee ended with a Union withdrawal. From the article:

"Following Union general William Rosecrans’s defeat at Chickamauga on September 18–20, 1863, the Army of the Cumberland fell back to the high ground and rail hub at Chattanooga, Tennessee. Confederate general Braxton Bragg chose to besiege the Union forces entrenched around the city, hoping to starve them into surrender.

In October, Gen. Ulysses S. Grant was given command of all Union forces in the west and replaced Rosecrans with Maj. Gen. George Thomas. After securing the vital “Cracker Line” to feed his starving army and defeating the Confederate counterattack at Wauhatchie, Grant turned his focus to a Union breakout.

The three-day Battles of Chattanooga resulted in one of the most dramatic turnabouts in American military history. When the fighting stopped on November 25, 1863, Union forces had driven Confederate troops away from Chattanooga, Tennessee, into Georgia, clearing the way for Union general William T. Sherman's March to the Sea a year later. Sherman wreaked havoc as his troops blazed a path of destruction, burning towns between Atlanta and Savannah in an effort to cripple the South."