The military power of the United States is undoubtedly the strongest in the world. Although the sudden appearance of the enemy caught them off guard, the U.S. military command responded immediately, and its vast military forces began to showcase their might. Various powerful weapons forcefully contained the enemy within Kansas State, preventing them from advancing further. However, the people of Kansas within the United States suffered torment akin to Hell; countless civilians were slaughtered. The U.S. President's approval rating plummeted to historical lows in a single moment.
In an effort to salvage the situation, the United States deployed its most powerful Mecha Soldiers into battle. But can they withstand the sweeping gray energy?
