Modern Marvels

Season 6, Episode 41

Episode Title: Forts

Air Date: 1999-10-25

Overview:

The art of fortification evolved along with man’s need to defend his territory from attack. There was no other reason. From hills surrounded by branches and crude fences to intricate walled cities, to impenetrable castles – the strongholds of the past echo the history of great battles for territorial control.