The Earth Interregnum

At the dawn of the 22nd Century, the human race was poised for greatness. The Solar System was being rapidly colonized, and the stars were almost within reach. The future potential seemed limitless. Then it all changed. Two alien fleets appeared near the orbit of Saturn and fought their way across the system, savaging everything in their path. When the fighting is finished, the human species enters the five-hundred-year period known as the Interregnum. A period of rebuilding, warfare, and discovery.