History Channel - Ancient Discoveries Collection (2009-2011) Part 13 Impossible Army Machines

Part 13: Impossible Army Machines

The amazing successes and stunning failures of ancient military engineers influence today's weapons and tactics; an ancient Greek weapon is still used on aircraft carriers; rapid-firing Chinese catapult; Hannibal crosses the Alps

Part 10: Ancient Tank Tech

Asian battle elephants and Europe's medieval knights in armour demonstrate people in the past understood the modern tank's principles combining protection, speed and firepower; ancient antitank weapon.