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
Ancient aesthetics (1345 A.D – 1521 A.D), The Romans (550 BC – 465 B.C,) the Persians (550 BC – 465 B.C), Chinese civilization (1600 BCE-1046 BCE,) Mayan civilization (2600 BC-900 A.D,) Ancient Egypt (3100 BCE-2686 BCE), Indus Valley civilization (3300 BC -1900 BC) and Mesopotamia (3500 BC -500 BC.) Ancient or archaic Greece is classified as the time period between 800 B.C. and 500 B.C. Beauty in ancient Greece (800-300 BCE) was referred to as κάλλος. The history of ancient Greek aesthetics spans centuries.Philosophical theories of beauty through this era fall under categories of proportion, functionality and the Form. Influence of beauty