Triggers: Weapons That Changed the WorldS01E04

Triggers: Weapons That Changed the World : M777 Howitzer

S01, E04 (First Aired: December 21, 2011)

The M77 Howitzer -- the most widely used artillery piece by U.S. Forces.

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S01, E03 (First Aired: December 14, 2011)

The evolution of the submachine gun.

S01, E05 (First Aired: December 28, 2011)

No rifle has proven more successful or more lethal.

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