I've never actually GMed a nation RP before, so if you have any suggestions, feel free to speak up.

Since the collapse of the Terran Empire two centuries ago the galaxy has been at war.  Dozens of alien races saw the collapse of the only order they had known in recent centuries. Some were technologically advanced, but some barely had functional FTL technology, having been uplifted by the Terrans or other races. Though once allied together as subjects of the Terrans, they began to form independent governments which all fought over territory, seeking to become the next ruler of the known galaxy.

From the unexplored sectors, beyond the edge of the Terran Empire's old borders, a new threat has appeared.  Known simply as Nebula, these beings swarm systems, devouring them for raw materials.  They do not care who lives in the system, and have made no attempts at communication with those they destroy.

The various nations must band together to present a united front against Nebula, before it grows too large to be stopped.

[hr]

I'll be playing what's left of the Terran Imperial Fleet, around ten thousand ships, mostly civilians.  We'll be using extremely advanced tech, but will have no homeworld, as Nebula attacked the Solar system, the last remnant of the Empire.  There will, however, be other human colonies out there if you wish to play as a human.