I'm now working in disambiguation pages. It will be like Althistory. Btw, you also can join this work.
But, when I try to discover pages about nation (e.g. United States), I look at category (e.g. Category:United States), but the category is filled with map games and main pages of timelines.
So, this is my proposal.
Map game will be categorized with just "Category:Map Games", "Category:Active/Inactive/Proposed Map Games", "Category:<<Map Game's name>> (Map Game)", or if it is OP, you can add category of ASB. You don't need to add category of nations, like Category:France, Category:United States, etc. although these nations are played.
For main page and war article, you also don't need to add category of nations.