At Alpha Centauri, the United Nations of Earth made their last stand against the Medari Council. Humans would have been willing to consider joining if the dominant race of the Council, the Medari, didn't demand that all races convert to their religion. The war was going poorly until humans produced the new phase cannons and establishing a policy of destroying their ships to ensure the enemy never gets one. At Alpha Centauri, the phase cannons almost carried the day but instead it ended with the Japanese fleet heroically sacrificing themselves to cover the evacuation of civilians to Sol. Among the broken remnants of humanity, grandparents and parents pass on the stories of those heroes, the few ark ships hiding deep in space, and the legend of a ship that was supposed to save them all. Excalibur.