This timeline is which all countries are consisted in a league and those leagues are always in fight with each other. This assumes that both Western Roman Empire and Eastern Roman Empire are still surviving. By the way, this is not one of those game mods.
Except Catholic League and Orthodox League, Most leagues have their presiding state to have at least one or more votes in the governing council of Leagues. However Orthodox League has its lower house as Eastern Roman Empire's Senate, while Catholic League has Western Roman Empire as the source of its technology and culture, spreading its hegemony inside the league.
Leagues by continent
Protestant League (Leader: Selected by voting of member states. Currently England)
Mid Western League (Leader: Sioux)
Middle League (Leader: Aztec Empire)
South Eastern League (Leader: Incan Empire)
South-Northern Barbaric League (Leader: Non-Existent)
South-Southern League (Leader: Selected by voting)
The non-profit organization from the Tibet League makes the most official while the most unprejudiced ranking list .