 They became ever-more-powerful with the ongoing development of superior drone ammunition.These technology improvements made to the miniature warp engines powering drones made possible the development of ordinary shuttlecraft into the decisive "attack shuttle", which became generalized by the term "fighter".In their earliest forms they merely augmented starship firepower, but developed into formidable "economy-of-force" or "attrition" weapons that decided the most important battles of the early General War.