Overview: During the Anglo-Zulu wars in South Africa, the success of small British regiments against huge numbers of native warriors became the stuff of legend. But in one key 1879 battle, Zulu fighting unites known as Impis decimated the British forces at the battle of Isandlwana. Historian Ian Knight and forensic archaeologist Tony Pollard investigate the battle scene, trying to assess the impact of a solar eclipse on the outcome, and discovering the Zulu use of performance enhancing "battle drugs" that included cannabis and a powerful hallucinogenic mushroom. New evidence reveals the changing tide of the battle, the innovative strategy of the Zulu and one Critical, irreversible British mistake. (UK/PBS 55 min)