Choosing the region to attack

Armies choose the least protected region of the enemy for battle. In this case, not all regions can be attacked, but only the neighboring region, the region that was originally under control of the attacker, or occupied by attacker during the war.

Gameplay Tips
Sometimes it’s easy to predict which region the enemy will choose to attack. Such a region can become a trap for the occupier if you set up an unpleasant surprise there by provoking an uprising at this region in advance.