Castles are odd, aint they?

[Saber Cherry]

...There could be a command, "Research and Defend Province," that would solve the problem. AFAIK, only "Research" has this problem... I think Blood Hunt, Summon Allies, Preach, and so forth also defend the province, but I'm not sure. Maybe any action that can be done while under siege prevents you from defending the province when a castle is in place?

Maybe the only way to solve it is to have a discrete "Defend Province When Attacked" toggle, apart from orders. Much like a "Never retreat from battle, you stupid Moloch, even if your wimpy imps rout" toggle.

[Endoperez]

I think that the only action that lets you defend the province, instead of the castle, is Patrol (and Move&Patrol). All other commands happen "inside" the castle.