Win battles by conquering the enemy ground or by forcing the enemy to surrender by lowering their morale.
The bars at the top of the screen will show the ground taken and the morale of your men. Each trench can accommodate up to three squads. Once in the trench, these squads can be forced out by using the unit controls. You can also lock the Trenches to stop any unit from entering the trench.
Earn upgrade points by winning battles and killing enemies. And then, buy bonuses with those points.