The History, Book 3: Thalia
An interactive exploration of Cambyses' madness, the usurpation by the Magi, and the dramatic rise of Darius I. This section of Herodotus' work chronicles a tumultuous period of transition for the Achaemenid Empire, filled with conquest, conspiracy, and divine retribution. Select a topic above to begin your journey.
The Reign of Cambyses
From the conquest of Egypt to a descent into madness, the reign of Cyrus's son was short, brutal, and transformative. This section details the key campaigns and the impious acts that Herodotus claims led to his downfall.
Conquest of Egypt
Fueled by a deceptive marriage proposal and guided by the traitor Phanes, Cambyses successfully crosses the desert to defeat the Egyptians at Pelusium. He captures Memphis and subjects the Pharaoh Psammenitus to a cruel psychological test before ultimately executing him. His campaign concludes with the ultimate impiety: the scourging and burning of the embalmed corpse of the former Pharaoh Amasis.
Failed Expeditions
Cambyses' ambition overreached his planning. An expedition against Carthage was canceled when his Phoenician fleet refused to attack their kin. His march against the long-lived Ethiopians ended in disaster, with his army resorting to cannibalism due to lack of supplies. Finally, a force of 50,000 men sent to conquer the Siwa Oasis vanished without a trace, allegedly swallowed by a massive sandstorm.
Descent into Madness
Herodotus attributes Cambyses' madness to his sacrilege against the sacred Apis bull, which he fatally stabbed in a fit of rage. This act allegedly unleashed a series of atrocities: the secret murder of his brother Smerdis, the killing of his sister-wife, and wanton cruelty against his closest advisors, cementing his reputation as a paranoid and impious tyrant.
The Rise of Darius
While Cambyses was dying, a conspiracy unfolded that placed an imposter on the Persian throne. This section explores the uncovering of the fraud, the famous constitutional debate among the conspirators, and the clever ploy that secured the crown for Darius.
The Magi Usurpation
With Cambyses away, two Magi brothers conspire to seize power. One, who bears a striking resemblance to Cambyses' murdered brother Smerdis, is placed on the throne. The fraud is eventually uncovered by the nobleman Otanes, whose daughter confirms the new king is an imposter by discovering he has no ears—they had been cut off for a past crime. Otanes gathers six other nobles, including Darius, to overthrow the false king.
The King is Chosen
The seven conspirators agree that the next king will be the one whose horse neighs first at sunrise. Darius's clever groom, Œbares, ensures his master's victory by leading Darius's stallion to a mare the night before. At the appointed time, the horse neighs, a clap of thunder seals the omen, and Darius is acclaimed as the new King of Persia.
The Great Constitutional Debate
After slaying the Magi, the seven conspirators held a legendary debate on the best form of government for Persia. Click below to explore their arguments.
Select a form of government to see the argument for it.
Key Figures
Book 3 is driven by the ambitions and fates of powerful individuals. Explore the stories of the kings, tyrants, and conspirators who shaped this era. Click on a name to learn more.
The Persian Empire Under Darius
One of Darius's first acts was to organize the empire into a coherent administrative system. He established twenty satrapies, each responsible for a fixed annual tribute. This chart visualizes the immense wealth flowing into the Persian treasury from across the known world.