Module System
[Unlock Condition]
After passing Pass Balkan Peninsula instance. The level of module system changes with the instances you passed.
[Introduction]
To improve attack、defend and force of all your troops.
[Acquisition]
After passing the NPC instance you'll receive some drawings. When you own all the drawings it needs to make, the module can be made after consuming some resources.
After making modules, your troops will be improved. You can consume iron to strengthen modules to enhance effect.