It looks like a great deal of other players are experiencing this as well. I and many others believe it to be the greatest most glaring problem with the game right now.
Around the year 1085-1090 in game, any given kingdom seems to become unimaginably powerful almost completely nullifying nearly 20 to 23 hours of gameplay seeing as the kingdom in question is completely unstoppable.
It seems that the moment an AI kingdom/faction conquers and controls one or more of another kingdoms lands they become exponentially powerful, stronger than any other kingdom.
Around the year 1085-1090 in game, any given kingdom seems to become unimaginably powerful almost completely nullifying nearly 20 to 23 hours of gameplay seeing as the kingdom in question is completely unstoppable.
It seems that the moment an AI kingdom/faction conquers and controls one or more of another kingdoms lands they become exponentially powerful, stronger than any other kingdom.