The Evacuation of Chandrila is the event that the Unicron's Dreadnoughts are coming on Four Worlds such as Earth, Endor, Chandrila, and Christophis. It was to be the retreat of the heroes before the base was evacuated. Later in the Series, The Heroic Battlefleet Massing in Orbit of Chandrila to be safe. This Battle Occurs in Galaxy Star Super Miracle Night II: The Revenge of Xenonair.
Once the Planet Chandrila is apparently under attack by Unicron's Dreadnought. However, the Heroic armies want to evacuate before it's too late.