History by Polybius. Volume II. French edition translated from Greek by Dom Vincent Thuillier. Comments of Military Science enriched with critical and historical notes by M. De Folard. Paris, chez Pierre Gandouin, Julien-Michel Gandouin, Pierre-Francois Giffart and Nicolas-Pierre Armand, 1727. Printing by Jean-Baptiste Lamesle. Treaty of military attacks. Ballista. It was an ancient missile weapon that launched a large projectile at a distant target. Engraving. Later colouration.