It is said that the tactics of Hannibal, Alexander the Great, and Napoleon are still taught in military academies like West Point. How do classical and early modern military tactics still apply today, when the composition of armies and warfare are very different?

by PrimeCedars

For example, how do Hannibal's tactics of the Battle of Cannae, a battle fought by foot soldiers and cavalry, apply today, 2,000 years later?

CourageousKoala

Related question, to what extent do these ancient leaders' tactics get taught in modern military schools?