A strategic tower defense game : "National Defense".Defend the road that leads to your home base strategically place your powerful machines along the road to destroy any incoming enemies. Earn money for each enemy you destroy. Will you be able to defend your base in every level across the United States?Choose wisely, as you have only 5 lives.If you let 5 enemy vehicles pass through you must restart the game from the beginning.8 compelling levels with 18 exciting waves are waiting for you to master.With each level you pass the enemies get stronger, one small mistake could cost you the entire operation.However in the first 3 levels you will have the opportunity to learn the necessary skills to become a successful strategist.