[quote=@ChronoBovino]
So this whole thing can You send couriers and make alliances? And by any History do you mean any E.g Hitler won the war ?
[/quote]

Yes, You can have things like semi-modern things like Hitler Winning Ww2, or ancient things such as the first empire rising in North America. And you are correct about the alliances, but instead of you sending a person to send a message, you send them a message like modern nations do now, over Email or phone, or meeting between the two leaders.