And then there was, shutter, Turtledove’s “Guns of the South,” where time-traveling South Africans equipped Lee’s army with AK-47’s.
ITSHWTCW is more about the 1950s than the 1860s. I mean, everybody is nice and decent, and everything works out in the end, and the world a century later looks the same as it does in our own reality. It's Eisenhower-era consensus all the way. By the end you kind of wonder why there even was a Civil War.
Anyway, here's another early counterfactual book that got lost in the shuffle:
