Knight and Daye - Sherrie DeMorrow

With the attack upon Earth, and alien consumption of the recycling and rubbish to use them as weapons, Humanity had to flee to the farthest corners of the universe to survive.   There were no longer resources, food or shelter for anyone.  However, human resistance movements had saved as much recycling as possible to create their own weapons on the distant worlds they inhabited.  After over a millennia of war, it was only ended when the alien races agreed to let the humans be........