Might a Persian army of 50,000 people, buried under the desert sand 2,500 years ago be awaiting discovery? What could be one of the greatest archaeological finds in history was suggested by a careful reading of Herodotus, who told in one of his “Histories” of a king of the Persian King Cambyses, which is said in 525 BC to have lost his army in the Egyptian desert after a violent wind storm hit while they marched to Amun.