Basically in the game the giant meteor which is supposed to destroy the earth in 2012 was actually sent by aliens. Just as the evil people in black where about to anihilate the white guys from a very long time ago. So in the middle of this was repereation which where on the evil peoples side. And earth was about to land the first people on mars when sudden;y the metor hit and they got destroyed. And the thing is that as soon as the people would land on mars they would discover the evil black people and they where the only ones which could stop them because they had carried some deadly germs which could kill the black people and save the white people (I know this is starting to sound really racist but I can't think up any better colors.) So the white people knew this so they built the meteor in 2007 and sent it to them. So the Earth people knew the end was nigh so it launched a next space race to get to mars (which was the only inhabitable planet left that they knew of.) So the black guys wanted to kill the white as an act of revenge and so they could steal their planet. The repreation knew that if they join the black people they would be unstoppable, but it would be really evil, and to show that they where sorry that they got into a war a very long time ago with them. But in the repreation there was some people who thought that they should help the white people because of a prophecy that said that they would have their time and it would be best to join them. The other half thinks that's a load of B.S. and that the prophecy wasn't true and eve if it was, it had already happened to them before recorded time. So they broke up, the neo federation turned green and joined the white, the old republic turned red and joined the black.