Wars become even bloodier as new technologies keep evolving. An international team of experts tests the deadliest weapons upgrades in the history of warfare. Designed to penetrate solid armor, the Scorpio makes use of the power of torsion. With the long sword, European knights slaughter their opponents on the medieval battlefield and Henry's rifle changed future wars with a revolutionary design: the lever action. Looking forward, a futuristic image of a combat robot army can be the next generation of infantry.