Mans thirst for expansion and riches, may only be slightly quenched by the near endless resources in the universe. Never the less, he pushes on, seeking those little drops of water in the desert. But he is never alone in his quest, his fellow man seeks to take those drops for himself. He would even be so brutal as the put an end to his kin, if it wernt for the fact he could trade such a valuable resource for comfort. But 15000 years from now, Man doesn't need water to quench his thirst, for he has a new resource he requires more than water, natural resources so vast a single planet could never contain. So he pushes outwards, towards the 1000s of new ones discovered everyday. And as before, he must reach these drops of water in the desert before his competitors do. Else he would feel the urge to eliminate his fellow man.
Here you will see how a ship collects supplies, builds tanks and fights.