The term could also refer to especially large droids with legs (usually combat droids), though such droids were usually referred to using more specific terminology (such as 'spider droid'). ' These weapons of war would be awe-inspiring, were they not so terrifying.' ― Supreme Chancellor Palpatine Ī walker was any vehicle, usually military, that used legs as its primary method of locomotion rather than the more common repulsors, wheels, or treads.