In the third round of the Battle of the Branches, four Marines are tasked with forging one of the most versatile, and iconic combat knives in history: the KA-BAR. As an additional challenge, these smiths must adapt and overcome to forge together metals from a massive anchor using the San Mai technique. After a punishing round of testing, the two surviving smiths return home to forge a weapon that was crucial to history: the Marine Corps Officers Sword.
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