§ 220. The sieges that Cæsar's armies conducted were against two sorts of fortifications, — the walled towns of the Gauls, as Alesia, and the more elaborate works that defended haunts of Graeco-Roman civilization, like Massilia.
§ 221. The former were comparatively simple, and fell usually without much difficulty before the resources of Roman military science. The defences of Massilia, however, had been planned by the same engineering skill that assailed them, and the town was supplied with every appliance of resistance known to the military art of the day. The siege of that city was a grapple of giants.
B. G. II, 12.
C. II, I-15.
. § 222. Cæsar gives a clear account of the construction of a Gallic town wall. Logs are laid on the ground, two
Fig. 45. Horizontal Section of Gallic Wall.
B. G. VII, 23.