A major reason why Loonies, mostly unarmed,, were able to kill armed and trained soldiers lay in fact that a freshly landed earthworm can’t handle himself well. Our gravity, one-sixth what he is used to, makes all his lifelong reflexes his enemy. He shoots high without knowing it, is unsteady on feet, can’t run properly---feet slide out from under him. Still worse, those troopers had to fight downwards; they necessarily broke in at upper levels, then had to go down ramps again and again, to try to capture a city.