Wall Defense Information

Caltrops
The purpose of Caltrops is to slow the attackers at maximum range while the army and other defenses attack them at range.


 * Caltrops do very little damage; they rarely kill troops alone.
 * Caltrops are completely ignored by Cavalry, Supply Wagons, and Siege Engines: they move right past.
 * Caltrops should be used with Archers and other range troops defending your city, or with wall-mounted crossbows.

Spiked Barriers

 * Spiked Barriers stop both types of Cavalry, Siege Engines, and Supply Wagons until they are destroyed.
 * Spiked Barriers do some damage and can easily wipe out Supply Wagons if they are ignored.
 * Spiked Barriers are completely ignored by infantry troops: they move right past.
 * Like Caltrops, Spiked Barriers work best when holding enemy attackers at range for your other troops and defenses.

Traps

 * Traps are single-use defenses - they will be destroyed when they attack enemy troops.
 * Traps do a lot of damage, nearly guaranteeing that the attackers will take some losses.

Wall-Mounted Crossbows

 * Crossbows are very effective defensive units and have a longer range and can do much more damage than Archers.
 * Crossbows work very well with Caltrops and Spiked Barriers to hold the enemy at their long range.
 * Crossbows have shorter range than Ballista and Catapults, so they are susceptible to attacks from these units.

Defensive Trebuchets

 * Trebuchets will only attack Siege Engines and will completely ignore all other units, including supply wagons.
 * Trebuchets have an enormous range and very high damage, virtually guaranteeing that it will destroy an enemy siege engine before it can get into range.
 * Trebuchets are single-use defenses: they will be destroyed when they fire upon an enemy Siege Engine.