On the border is a lone protective structure, which is designed to protect the territory. This building was not used for many years, until the enemy again found himself on the border. Recover the work of the huge gun, as well as prepare the soldiers to send them to attack or to protect the building. Opposite you will be exactly the same structure, only the enemy. It is necessary to constantly send an army there, so that they inflict damage. As soon as life falls to zero, the building will be destroyed and the victory is yours. But remember that the enemy is strong and will be a worthy opponent for you in this battle.