Andy wasn't much of a fighter, but he was fast at fleeing.
Once he had dispatched all the Void Magic Squads he had brought with him, he took a few warships and fled without looking back. He escaped early and quickly enough that when the Alliance Army completely shattered the enemy, he had already left the battlefield, and even the blocking forces led by Felly couldn't stop him.
Upon returning to Hongshou City, he immediately activated the flight mode of Sky City, planning to escape.
But Andy was clearly confused, for if he truly could have escaped like this, shouldn't he have run away much earlier? Why would the Rebel Army have him hold the position for five days waiting for reinforcements if it weren't for the fact that escape was impossible!
Sky City, though capable of flight, had a known speed that, while enduring, could not possibly outpace a warship.