It was my first serious attempt at modding, and arguably the only semi-successful one. It took place in what was essentially Harry Turtledove Timelime 101's Universe, where the South won the war, with the help of the British and French. Which set up an interesting type of World War 1, with the United States allied to Germany, and the Confederates to the Entente. My first NES took place from 1914-1921, in which the war was fought, and won by the Central Powers, peace terms were dished out, and a different Russian Civil War started up.
I'd start it in 1922, as Europe is still in turmoil, as the victors struggle with their massive new gains, and quasi-fascist movements start in France, Spain and (sort of) the south. If you've read TL-101, it has so far followed the same route, entirely through player action interestingly enough.
So far, I've established semi-reasonable man-power stats, doing research into adjusted economic stats for nations, and have some other kinks to work out in the ruleset. The map itself is going to be finished in just a bit, I'll post it on here for you to take a look at.