Thanx for the great input. I think we talked about this a few years ago, and I look forward to seeing your book, when it does come out. FYI, Clinch's regiment didn't "fall off the map" at all after Sept 1864, but their muster and admin records for the period 30 June 1864 to the end of hostilities seem not to have survived, along with those of the majority of the Confederate Army of Tennessee, as I am advised. That, of course complicates documenting the regiment's experiences during that period. But, I have much other documentary evidence that Clinch's command went to Atlanta in Aug 1864, was involved in all the fighting there, acted as Hood's rear guard under BGEN J.T. Morgan during the abandonment of the city, and was very much involved in opposing Sherman during his "March to the Sea." In fact, they were in the vicinity of Waynesboro during the time Kilpatrick's forces captured the flag of the 4th GA Cavalry. The complicator, of course, is that so was Avery's regiment, and it had not yet evolved into the 12th GA Cavalry at that point. Moreover, BOTH were assigned to C.C.Crews' brigade at the time. So, sorting out which "4th GA Cav" is involved presents some challenge.
However, I would venture a calculated guess that Clinch's regiment had a flag (square ?) from the Dept of SC,GA, & FL, rather than an Army of TN flag (rectangular ?), since they served under the former from initial organization until the end of July 1864, then joined the latter in early Aug 1864. At any rate, can you put me in touch with the museum in PA that has the flag ? I'd REALLY like to talk to them !