OK, gain inspired by watchin Gary Busey as Fightin joe Wheeler in ROUGH RIDERS (not to mention other high-ranking US generals like William Shafter), WI other such ACW vets had made an appearance in a combat capacity in the SAW ? Guys like say, among others:
Joshua Lawrence Chamberlain (who did in fact, despite his severe war wounds, offered his services as a US Army officer to fight in Cuba but was turned down- which he cited as a major disappointment)
Benjamin Grierson (had he not retired from the Army in 1890)
Simon Bolivar Buckner
Wade Hampton