During the Roman occupation of the Holy Land in the first century, the Sicarii serve as hitmen, working toward the liberation of Judea and the unification of the country.

Eagle Warriors, trained to capture and not kill, serve as the elite troops of the Aztec Empire, which dominated Central America from the 14th to 16th centuries.

The elite units of the Byzantine Army, the Varangian Guard, served as personal bodyguards to the Byzantine Emperors, and originated primarily from Scandinavia and England. Along with the prowess in combat they wielded highly effective weapons.

The Spartans are bred for war, trained from youth to withstand pain and survive the harshest conditions. Their greatest warriors form an elite special forces unit, the Spartan 300, which aims to defeat the Persians.

"World's First Terrorists": In 11th Century Persia, the country we know as Iran, Hasan i Sabbah, the leader of the Ismailis (Shia), creates the Assassins to fight in the age old conflict between Shiite and Sunni Muslims.

The Ninja, or Shiobi warrior, developed a unique set of tactics that typical armies could not execute.

Hawaiian Koa warriors were the special forces of their time. As battlefield champions and royal bodyguard, they were grand masters of a martial art called Lua. More than mindless warriors, the Koa were on a lifelong quest for Mana: a spiritual energy that symbolized power, influence and authority.

Viking long ships roll up to Lindisfarne in 793 and launch a brutal attack on the Island's monastery that forever impacts England's history.

The Ghost Warriors, a fanatical corps of proud and independent fighters, trained to fight at night. These elite special forces of ancient Germany would appear out of the dark, sowing fear and panic among their enemies like the Romans.

The 47 Ronin, the Samurai followers of feudal lord Asano Naganori, mount the perfect covert operation in early 18th-century Japan.