Four bladesmiths take a stab at history when they are tasked with recreating an iconic fighting knife from the 20th century: the Fairbairn Sykes.

Four bladesmiths must forge signature blades from different sizes of spring steel. Competitors toil with the canister Damascus technique with varying degrees of success.

In a special five-part competition, top bladesmiths from each branch of the U.S. military - Army, Air Force, Marines and Navy - compete to earn a spot representing their branch in a battle for our biggest prize ever: $50,000.

In Round Two of the Battle of the Branches Tournament, four airmen from the U.S. Air Force must forge a Bolo knife using the San Mai technique.

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.

Round Four of the Battle of the Branches sets sail as four Naval officers must forge a multipurpose Naval Mark 3 Dive Knife with metal from a giant anchor chain.

In the final round of the Battle of the Branches the winning Soldier, Airman, Marine, and Sailor return to the forge for the ultimate showdown.

Four bladesmiths are in for a workout when they are tasked with forging signature blades from gym equipment. After a severe round of testing, the two remaining smiths have only four days in their home forges to recreate one of Japan's deadliest swords: the Nagamaki.

Four bladesmiths take a stab at history when they are tasked with recreating an iconic fighting knife from the 20th century: the Fairbairn Sykes.

Four bladesmiths must forge signature blades from different sizes of spring steel. Competitors toil with the canister Damascus technique with varying degrees of success.

In a special five-part competition, top bladesmiths from each branch of the U.S. military - Army, Air Force, Marines and Navy - compete to earn a spot representing their branch in a battle for our biggest prize ever: $50,000.

In Round Two of the Battle of the Branches Tournament, four airmen from the U.S. Air Force must forge a Bolo knife using the San Mai technique.

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.

Round Four of the Battle of the Branches sets sail as four Naval officers must forge a multipurpose Naval Mark 3 Dive Knife with metal from a giant anchor chain.

In the final round of the Battle of the Branches the winning Soldier, Airman, Marine, and Sailor return to the forge for the ultimate showdown.

Four bladesmiths are in for a workout when they are tasked with forging signature blades from gym equipment. After a severe round of testing, the two remaining smiths have only four days in their home forges to recreate one of Japan's deadliest swords: the Nagamaki.

Four bladesmiths take a stab at history when they are tasked with recreating an iconic fighting knife from the 20th century: the Fairbairn Sykes.

Four bladesmiths must forge signature blades from different sizes of spring steel. Competitors toil with the canister Damascus technique with varying degrees of success.

In a special five-part competition, top bladesmiths from each branch of the U.S. military - Army, Air Force, Marines and Navy - compete to earn a spot representing their branch in a battle for our biggest prize ever: $50,000.

In Round Two of the Battle of the Branches Tournament, four airmen from the U.S. Air Force must forge a Bolo knife using the San Mai technique.

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.

Round Four of the Battle of the Branches sets sail as four Naval officers must forge a multipurpose Naval Mark 3 Dive Knife with metal from a giant anchor chain.

In the final round of the Battle of the Branches the winning Soldier, Airman, Marine, and Sailor return to the forge for the ultimate showdown.

Four bladesmiths are in for a workout when they are tasked with forging signature blades from gym equipment. After a severe round of testing, the two remaining smiths have only four days in their home forges to recreate one of Japan's deadliest swords: the Nagamaki.