Note 1427 — BOOK VII.835 MAN, HIS BIRTH, HIS ORGANIZATION, AND THE INVENTION OF THE ARTS. (continued 2)
John Bostock translation
The “tortoise.” He probably means a military machine, moved on wheels and roofed over, used in besieging cities, and under which the soldiers worked in undermining the walls. It was usually covered with raw hides or other materials, which could not easily be set on fire. The same name was also applied to the covering formed by a compact body of soldiers, who placed their shields over their heads, and linked them together, to secure themselves against the darts of the enemy. The latter kind of “testudo” was sometimes formed, by way of an exercise, in the games of the Circus.