Okay so I did not expect this much interest! So let me expand a bit more on how this will play out:
Here's the starmap on which the game takes place. The Hierachy will bring in fleets from Kardoen and invade with the end goal being Sol. You, the players, will each take control of one Terran fleet (5 factions, each with some slight differences) and coordinate with each other to repel the alien invaders.
New turns will be each 3 days, each new turn there will be reports on fleet movements and how battles went (yay for embedded youtube support). Then you'll be able to give new orders to your fleet. Perform excellently and you might get promoted, giving you a choice for a new trait that will improve your fleets performance. Make no mistake, the Hierachy will be relentless and your ability to resupply your fleet to keep it in fighting condition will depend on the global resource pool available. See that number next to a star system? That's how much resources a system is able to contribute to the wareffort. Losing those key systems will hurt and will have negative effects on fleet morale.
More info and instructions on how to actually play will follow once I have completely worked out all the details (and have confirmed it actually works).