The idea that when you start the game in 36 you get an event (or chain of events) to get you to Alt-story (simulating what happened before). Maybe with a focus three like that of Nazi Germany for Oak, where it is "always false" which is only used to keep track of your progress.
Could Germany win WWII? For some historians No, for other historians the hopes end on 7 December 1941, for others if some operations to the allies had not succeeded (or vice versa the axis would have been fine). Because in a war, EVERYONE makes mistakes. But whoever commits less wins! Now the other scenarios (Greece Byzantium, Italy Roman Empire ...) are memes in 99% of cases. Could Germany defeat the USSR? Yes, it came close and if you get close to something, you can do it. Of course they also have to change the mechanics. Like if I capitulate the UK, the US makes a white peace (already the D-day has almost failed and there was no uboat and they were a stone's throw from Normandy, what do you think if they had to make a landing from the USA in France? The kriegsmarine and the lutwaffe would have plenty of time to call the Uboat / bombers and destroy everything, and eventually those who land would be mowed down by the defenders, the supply difficulties ...).
If things have gone one way, it doesn't mean it's the only way they could have gone. To give other examples: could Rome have failed to create the empire? Yes. Could the US lose the war of independence? Of course, on paper they were hopeless. I can go on giving examples for hours.