I've found this map at the LoC to be useful in locating Civil War sites. Although it's 1888, and there are many roads which are more recent than the war, it's still close enough to the 1860's that many locations are the same, such as the site of the skirmish at Morning Sun, and the farms of many people who lived near Memphis during the war. This map is pretty accurate and easy to overlay on a modern map with minimal distortion.
During the war, my Civil War ancestor William Harry Sawyer and his brother Wilson L Sawyer of the 1st TN Partisan Rangers, later the 12 TN Cavalry, lived with his folks at the property in district 9, marked WH Sawyer and to the West of Morning Sun. This property is now the northern part of the Countrywood suburb of Cordova, including most of the golf course. Harry Sawyer's bride to be, Nancy "Nannie" Woodson, lived with her widowed mother's relatives at the JW Crouch property in district 7, just to the north of Cheatham. This property is today next to Evangelical Christian School. Harry and Nancy were married on Christmas Day in 1864, apparently when Harry was on furlough from Forrest's forces. It's known that Forrest furloughed a large number of men over that period.
Nancy's father and grandfather, William and John Woodson, were deceased by the time of the war, but close relatives, the Hornes and Daltons, still lived at their old place in district 8, in Brunswick, where John Woodson, one of the first settlers in the area, had been the postmaster. The Brunswick post office is still at this location today.
https://www.loc.gov/resource/g3963s.la000879/
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