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Weapons technology has progressed from catapults to laser-guided weapons through a combination of ingenious inventions, lateral thinking, battlefield experience and no small degree of luck. But the line of fire from early innovative weaponry to modern super weapons is rarely an simple family tree. WEAPONOLOGY draws together and illuminate the great leaps that designers have made in military technology over the last centuries.

This season WEAPONOLOGY focuses on the world's elite fighting units. Travel back through generations of technology to find out how the United States Marine Corps, the Green Berets, Navy Seals and other legendary military units evolved the weapons that led to victory.