[Charles22]

That only works if the designer made it that way. I think with the main campaign games, they are meant to have histroic locations, no matter if your great victories or defeats would had likely changed that, afterall, your force is small when compared to an entire front. So maybe Operation Barbarossa had 20 more tanks kills than what was historic by your performance, that wouldn't have changed things in all but a very local area.

I think I have been through the Gerry campaign long enough to see that Sealion isn't possible with the main campaigns (partly because it was a plan only), and also since Olympic was to not take place but for several months after the surrender, I doubt they would include that in the Pacific.