Synonyms for Light-armed (same or very similar meaning)
WordNet sense 1 (armed with light weapons):
lightly-armedWordNet sense 2 (of the military or industry; using (or being) relatively small or light arms or equipment):
lightWordNet sense 3 ((used of persons or the military) characterized by having or bearing arms):
armedFrom the ODE community, based on WordNetadd/edit