Thank you! So if I'm under seige for several turns, will all the troops arrive as soon as the siege is broken, or will the number of troops produced be limited to one turn's resources?
from patch 2.13:
# Unit recruit lists are greyed out while besieged.
You used to be able to buy them and they just would not show up, a waste of your money. Now the game prevents you from recruiting. I couldn't even make a temple with a priest stuck in a castle in my Last game.
In addition to not being able to build structures while under siege, you cannot destroy them. Something to keep in mind if you are doing a scorched earth strategy and think you might get caught up in a siege
If you try to recruit units while under siege and you don't manage to break it, the money is wasted. If you do break the siege, then the units of the Last turn are recruited as they normally would.