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. Gallic Wars. Military conflict between Julio Cesar and the Gallic tribes, 58-51 BC. Siege of Namur, 54 BC. Engraving depicting a mobile siege tower, mounted on wooden logs and pushed by soldiers with the help of cranks. Engraving. Detail.