In 331 b.C., the two most powerful armies in the world met outside a small village in what is now considered to be Northern Iraq. On one side stood Alexander the Great, the young King of Macedonia, and his small but highly trained force of cavalrymen and foot soldiers. Opposing him was Darius III, the King of Persia, with an army of men that outnumbered Alexander’s forces by ten to one. This documentary reveals how Alexander’s innovative military tactics during the Battle of Gaugamela - now considered to be one of the greatest military engagements of the ancient world - allowed him to prevail against seemingly overwhelming odds to become the master of his world and one of the greatest warriors in history.