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
Gaius Octavius (tribune 216 BC) disastrous battle of Cannae, being one of few survivors. When the Carthaginians marched into the Roman camp, Octavius and his colleague, tribune P. Sempronius Tuditanus, managed to cut their way through the enemy and arrived safely in Canusium. He served in Sicilia (modern Sicily) under the praetor Lucius Aemilius Papus in 205 BC, but it is unknown whether he took part in some other expedition. Gaius Octavius (tribune 216 BC) Gaius Octavius (fl. 216 BC) was a Roman army officer who was active during the third century BC. He was the son of the equestrian Gaius Octavius and grandson of