Almost every small boy was playing soldierswhen he was little. Place yourself in a circumstance, where the protection of our foundation stayed just your choice. If enemy units get through our defenses, then they are going to claim important strategic location, which may cost us the entire war, and we surely cannot permit that. Act quickly. Lay out safeguarding units, to ensure their scope to cover the maximum distance. You get cash for each and every enemy killed to get upgrades and new components. Have fun.