blocking passes;

If the AI registers an enemy garrison as a stationary party it would not move within range of the castle/town if the AI's party power level is too low. This would make it possible for castles located in mountain passes, or next to bridges, to block these roads. A big army with a power level...

I am wondering if it is possible to have the AI register an enemy garrison as a stationary party, This way a castle in a mountain pass would block the road for weaker enemy parties without exposing the garrison. A big army with a power level higher than the garrison would pass without a problem...