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
Quintus Fabius Maximus (consul 213 BC) Quintus Fabius Maximus (consul 213 BC) Quintus Fabius Maximus was a consul of the Roman Republic in 213 BC. He was the son of Quintus Fabius Maximus Verrucosus, the famous "dictator" who invented Fabian strategy, and served with his father during the Second Punic War. The younger Fabius was a military tribune in 216 BC, and was among the survivors of the Battle of Cannae who ended up at Canusium. In 215, he was curule aedile. As praetor in 214, he commanded two legions with which he captured Acuca in Luceria as well as a fortified camp near Ardoneae. As