# Catapult Mechanics

• How many catapults are needed to destroy a building from 20 to 0 even if whole attack army dies in attack?

• There is no upper cap, but you need at least 71.

In combat, not all catapults are able to shoot at their targets. If the off dies completely, 50% to 0% of the cats will shoot. This percentage is calculated using the formula (offense strength / defense strength)^1,5 / 2, where the respective strengths are taken into consideration after all boni and mali.

Since you need 35,08 ~ 36 catapults level 20 to fully destroy a level 20 building without losses, you will need at least 70,16 ~ 71 catapults level to fully destroy a level 20 building, if your off dies completely - in the very best case, which is that the def dies completely aswell.

• Be2 is too complicated ( ), just use the simulator and try to conservatively place your armies against your intended target (give defender some advantages for more certainty) to work out what it will take to achieve what you are looking for.

Professional Irritant & Memer [BM]TM

• Be2 is too complicated ( ), just use the simulator and try to conservatively place your armies against your intended target (give defender some advantages for more certainty) to work out what it will take to achieve what you are looking for.

Well, that works too ... kind of ... I guess. xD

• The relevant variables when considering how many catapults you need are morale bonus (ratio between attackers population to defenders population), stonemason bonus, as well as the relative strenght of the attacker to the defender (see equation above)

As Renou mentioned, just use the a combat simulator. IMO just use the in game combat simulator: Set up a worst case scenario where you insert the population of players, max stonemason (if capital) and perhaps 4:1 advantage for defenders (or whatever is relevant for you). Then add catapults untill you manage to destroy the buildings. For capitals that usually requires several hundred catapults but for really higher ratios there really isn't an upper limit.

If you expect that you will wall with your attack you should never send several waves as the waves following the main hammer will do no damage due to the extreme defenders advantage they will have.

Something worth mentioning is that stonemason and morale bonus does not apply to WW villages.