Not really a forum timeline, but currently I am playing in Darkest Hour a mod called Edge of Darkness and I am also writing an AAR for my campaign with Germany. What stands above all else is that without any intention, a PoD occurred, where similar with Harry Turtledove's The War That Came Early, Czechoslovakia chose to fight against Germany during the annexation of Bohemia in March 1939. This also led to Allies declaring war against Germany over Czechoslovakia Invasion and the war started 6 month earlier.
On top of that, USSR also began an Invasion of Poland in April 1939 and the prospect of war on 2 fronts is quite real. Ongoing AAR...