Fifteen years ago, there was a war. Well, war's broken out plenty of times before. They've tried to invade the southlands through the northern valley time and time again. Luck was never on their side, though, and their victories didn't last long. They didn't realize that times had changed. Facing one defeat after another, losing territory and watching their nation dwindle, they built up their industrial strength to unprecedented heights and used it to wage one final battle against the world. That was fifteen years ago...
— Ace Combat 5: The Unsung War
by Namco Bandai