Jason and Patrick thanks a lot.
Leigh, Thanks. The US military conducted a number of manoeuvers and reenactments on the actual ground these soldiers fought on during the Civil War. This photo may have been taken at one of these events or at one of the numerous reunion activities sponsored by veterans groups. There is no date or location given for the photo so I can only guess. There would have been two more shirt patterns after the 1904 that would have been worn by WW1 soldiers, the 1912, and 1916. If the front of the soldier had been shown it would be easier to narrow the timeframe. Anyway I went with an earlier shirt pattern as I do not want my veteran so old he would not be able to hold the rifle by himself like in the photo.~Gary