So anyway as the title says, when my highly capable emperor died, his less talented but still capable took over and the entire empire basically fell apart into various independent duchies, for seemingly no reason. The vassals weren't really rebellious so i dont see any other logical reason why the empire would break apart aside from sheer chance. Anyone know the reasoning behind it and to enlighten me? im not really complaining that it happened, it's actually a pleasant surprise and challenge. i just want to know why it happened. thanks!