Ballista Tower
Ballista Towers provides superb additional firepower to any defence.
Viper Trap
Set traps and put vipers into it to cause damage to your enemy.
Nail Trap
Dig deep pits and set spears so as to give fatal damage to the assaulting enemies.
City Wall
Huge Stone Wall is awe-inspiring for attackers.
Overheated Oil
Splash boiling oil to the enemies, and cause fatal damage to the attackers.
Moat
Excavate entrenchments around your city and draw river to build moat, providing better defence for you city.
Arrow Culverin
A good defensive tool able to shoot the attackers from different angles with thousands of arrows.
Hell Gate
Top-secreted military strategy.