October 23, 1863
---Today, Gen. Ulysses S. Grant arrives in Chattanooga, and takes command of the Military Division of the Mississippi, which basically gives him command of all Federal troops west of the Appalachians. Arriving after dark, Grant immediately finds the Headquarters of Gen. Thomas, the new commander of the Army of the Cumberland, and meets with Thomas and Gen. William “Baldy” Smith, who has already been at work on the pontoon bridge, and is planning another, and has jury-rigged a makeshift steamer to use on the supply line they hoped to open between Bridgeport (about 40 miles downstream) and Chattanooga.
—Pres. Jefferson Davis removes Gen. Leonidas Polk from command of a corps in Bragg’s Army of Tennessee. Polk is reassigned to command of troops in Mississippi, under Joe Johnston.