While traversing these great threads, I found Punitor Maximuses old WW1 mod. Someone suggested a submod idea, which I completely agree with. It's about Henry Turtledove's Book on a Southern Victory in the Civil War, which leads to two Americas.
These Americas choose different paths. The South finds itself an ally of France and England, while America seeks an alliance with Germany. As WW1 dawns over Europe, a new kind of war is fought in America, where territory is gained in inches. Perhaps someone with modding skills can make a Confederate faction for this submod's purpose.