
Ironically, it increases your village happiness due to the increased housing capacity.

#Stronghold Kingdoms full
Without a full troop of Archers stationed around your castle, enemy invasion is as simple as destroying the walls and walking right in. Archers are the bread-and-butter of castle defence.Though they're outclassed in damage by other units, their cost-to-resilience ratio makes them the unit of choice for general castle invasion. Pikemen units have the highest health of standard military units (the Captain and Sally Forths are situational), deal decent damage, and are cheaper to produce than Swordsmen and Catapults.

However it's mechanically impossible to do anything but destroy the castle walls (Catapults don't move), your catapults will certainly be destroyed (they're both expensive and tedious to produce), and it's reliant on hoping the enemy won't destroy your catapults fast enough for them to do significant damage. Awesome, but Impractical: It's possible to send an entire army of Catapults to wreak havoc on an enemy castle, with spectacular results.Attack! Attack! Attack!: Units on the offensive will continue to attack a castle until they finish their objective, even if they stand absolutley no chance of success.
