Please imagine if you had England, Wales, Scotland, several rival Irish kingdoms, Bretons, Anjevins, Normans (Actually most of that was English anyway, until John ruined it), Burgundians, Castille, Leon, Portguese, Aragonese, Navarrese, Almohads, and I'm not even going to start on the myriad of Italian and Germanic minor states which should be included if it were to be perfectly historically accurate. If you then factor in the requests for more Russian principalities, and in the Balkans the calls for Serbia, Bosnia, Bulgaria, Romania, Wallachia, Byzantines (though I will confess I do think the Byzantine Empire would be the most worthy addition) you reach a potentially huge number of states.