Defence in depth in order to retreat successfully, and they assume that the defender's morale will recover from the retreat. A possible early example of this came at the Battle of Cannae in 216 BC, when Hannibal employed this manoeuvre in order to encircle and destroy eight Roman legions, but that is disputed by some historians. Edward Luttwak used the term to describe his theory of the defensive strategy employed by the Late Roman army in the 3rd and 4th centuries AD. Later examples of defence in depth might be European hill forts and the development of concentric castles. In those examples, the
Terentia (gens) Terentia (gens) The gens Terentia was a plebeian family at ancient Rome. Dionysius mentions a Gaius Terentilius Arsa, tribune of the plebs in 462 BC, but Livy calls him "Terentilius", and from inscriptions this would seem to be a separate gens. No other Terentii appear in history until the time of the Second Punic War. Gaius Terentius Varro, one of the Roman commanders at the Battle of Cannae in 216 BC, was the first to hold the consulship. Members of this family are found as late as the third century AD. The antiquarian Varro derived the nomen "Terentius" from a