Deadly Evolution: Weapon Upgrades From the Japanese Katana to the Henry Rifle

This documentary charts how weapons evolved to make warfare ever deadlier, testing landmark upgrades from the Japanese katana to the Henry rifle. A team of experts recreates and fires these arms to understand how each innovation changed battlefield strategy, from ancient arrow launchers to repeating firearms. The film links engineering, history and the grim logic of the arms race. It is a hands-on tour through the technology that reshaped combat. Free to watch in HD on Dr Documentary.

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