From CojsWiki
Cambyses was the second king of the ancient Achaemenid empire (ruled 530-522) and the oldest son of Cyrus the Great.
The most important event during Cambyses' reign was the conquest of Egypt. He invaded Egypt and took the capital, Memphis, after a long siege. Cambyses was recognized as the new pharaoh.
The circumstances of Cambyses' death are shrouded in mystery.