This is a typical intra-system ship; note the much smaller fuel storage, and the absence of a habitation ring.

The liberation of Tetsuyama from Tripod forces took place largely due to fast orbital-insertion craft such as the one shown here. These are craft designed to land very quickly into atmospheres, dropping off troops, supplies, etc. and then making fast exits, or coming back later to pick things up.

Another orbital entry craft; a little more streamlined, but nonetheless designed for speed and not for grace.