The "level" of a unit, which has existed internally, will now be displayed as "(unit name)-L(level)" on the status and battle screens.
Levels range from 1 to 7, and are raised incrementally by accumulating experience.
As the level increases, the unit acquires a very powerful correction that reduces the damage of any attack.
For example, a level 2 unit will avoid and nullify 100% of all 1 damage, no matter what the attack is.
It takes 10000 experience to raise a unit to the maximum level of 7.
A bug has been fixed in which using retreat in battle would end the action of a unit that did not go to the battlefield and was waiting in its own territory, even if it was ready to act.