Forged in Fire (2015)

S6E12 Branch Battle: Marines

During the third round of the Battle of the Branches, four Marines face the challenge of crafting the iconic KA-BAR knife. To raise the stakes, they must utilize the San Mai technique to combine metals sourced from a colossal anchor. After enduring a grueling series of tests, only two smiths remain to head back and create the Marine Corps Officers Sword.