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
Lucius Aemilius Paullus (consul 219 BC) with Gaius Terentius Varro. He shared the command of the army with Varro at the Battle of Cannae. Varro led out the troops against the advice of Paullus and the battle became a crushing defeat for the Romans. Paullus died in the battle, while Varro managed to escape. Paullus was the father of Lucius Aemilius Paullus Macedonicus and his daughter, Aemilia Tertia, married Scipio Africanus. Lucius Aemilius Paullus (consul 219 BC) Lucius Aemilius Paullus (died August 2, 216 BC) was a Roman consul twice, in 219 and 216 BC. Paullus served his first consulship with Marcus Livius Salinator. During this