Forged in Fire season 6 episode 12
Episode title: Branch Battle: Marines
In the third round of the Battle of the Branches, four Marines are tasked with forging 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 the Marine Corps Officers Sword.
