I was just searching for some cold war servers and thought would be a lot easier just having a time period search dropdown bar like cold war modern etc.
The photo I have attached i think is a good place for a "Time period" dropdown bar to be for cold war, modern etc
Server owners would be able to "tag" or something, there server to best describe what it is so when people search the time period there server will pop. e.g Enigma cold war server would describe themselves as cold war.
It wouldn't be able to be customised by server owners. As then ease of use is no longer easy as it would introduce searching. Just premade time periods for easier searching. e.g Cold war, Modern, WW2 etc