General Upton was in the Wilson Raid through Alabama, into Georgia in early 65. Wilson's opposition was extremely light, as some Union soldiers commented on the small size of the Confederate forces and how they weren't afraid of General Forrest anymore. In other parts of the campaign that year, Mobile, whose defenses were constructed based upon having a garrison size comparable to that at Vicksburg, didn't have a true garrison. What troops that were available were sent over to defend the eastern approaches and that was only about 5000-6000 troops. There were accounts of captured Confederates at Spanish Fort talking to Union troops and asking in amazement were they get so many men.
Before Johnston was replaced the Confederate Army in Georgia was in good shape. Morale was up, the troops well equipped, and desertions were going down. The ranks were being filled somewhat with returning troops that had either legally or illegally left for home. Management of the Army in this theater was at its highest level of effectiveness. That soon changed.