The Invasion Chapter Four is a continuation of The Invasion Animated Series. In the last Chapter the Alien ships used a decoy to distract the Americans from the real army of invading alien ships. In this Chapter the hundreds of Alien ships begin heading for invasion. The general receives the bad news, and calls for the use of the X-71. It is their greatest weapon of defense, capable of destroying mass amounts of invading ships with great speed, and accuracy.