If we went into a golden age headed by NASA after discovering terraformation, and then when we sent explorers to the newly terraformed planets they found alien relics. what would logically happen after a civil war and an alien attack followed by a dark age? how would we survive scattered across the face of the Earth with aliens encroaching ever so slowly across the civilization we left behind? would a group unite everyone and then they build a city, would a bunch of old soldiers from the war band together to defend the people, Etc. What would the coming age be like? what would we do first after we got back on our feet with aliens spread across our lands? I have some ideas, but not sure if they sound logical for a situation like this, any help?