Ground combat is a somewhat more complicated beast than a space battle, ICly. Instead of hyperjumping in, shooting each other up, and then hyperjumping out, armies on the ground spend time securing their location, advancing through guarded areas bit by bit, and battling things out in both grand, large-scale battles and smaller side skirmishes. Because of this, we encourage players to take some time to RP some of these things out, while still trying to keep the conquering of a planet OOCly reasonable.