it is about attack bonus (ATQ), troop size, life points (HP), defense (DEF)...
On the economy side, it i... =====
To improve a skill of a type, you need Nova points of this type.
For example, to improve a military skill, you need military Nova points (orange) while to improve an economy skill, you need economy Nova points (turquoise).
===== Tips =====
Each day you get X
