Curated OER
National Park Service: Cwsac: Civil War Battle Summaries: Main Western Theater, 1863
From this site you can get a list of the major campaigns in the main Western Theater in 1863. Clicking on the links will take you to a description of each battle in each campaign.
Civil War Home
Home of the American Civil War: Chattanooga Campaign
Find a timeline of the Chattanooga Campaign as well as battle descriptions, maps, and the official records of both the Union and Confederate commanders. Information comes from a variety of sources.