Plus they work great defending as well, if you can keep clear of hitting your own walls. I think a well-used Siege engine is worth 100+ units in attacking a castle. Pick a Siege map and edit it and give yourself a lot of time and siege engines and experiment with distances, commands etc. The Trebuchet and Catapult are kind of quirky in their responses, and not always consistant. If you do _not_ click the button again, it will revert to throwing Stones at that spot unless you stop it or until it runs out of Stones (or sometimes when the enemy is killed).

Keep clicking the Cow button and it will keep firing them at the selected spot as long as you have Cows. It won't fire Cows at structures, and if the unit is out of range, it won't fire near, which does sometimes kill an opposing unit. You have to have an actual enemy unit in range for it to fire a Cow. Then mouse over the enemy, and you should get the 'red-cone' if they are targetable. A Catapult will also fire on an enemy Catapult with no direction from you, usually. Set on 'Aggressive' sometimes a Catapult will continue attacking. To stop, hit the 'Stop' button, an unheld hand icon, then to make sure, hit the 'Stand Ground' status. If its a specific structure, like a Tower, once its destroyed they will stop firing (not always though) If its an enemy unit, the unit is dead (sometimes they won't stop)ģ. If you do get the red cone, click on the target. If you get the 'green-cone' attack arrow, the unit will MOVE to that place, not fire. You should get the 'red=cone' attack arrow. Once it is properly manned, mouse over your selected target.

The Engineers will reapond with 'Catapult ready, M'Lord' if it is properly manned.

Stronghold crusader online catapult