Revolutions by the Greek city-states, Egyptian internal instability, the rise of Macedonian king Philip I determined to take it over, and its lack of armoured infantry capable of standing up to Greek/Macedonian ones.
The breakaway of the Greek city-states of Asia Minor, the rise of Macedonia and its conquest of Persia.
Cyrus and Darius the Great both ruled over the Persian Empire
Two centuries.
The Persian Empire and an alliance of Greek city-states.
Susa and Persepolis.
Cyrus and Darius the Great both ruled over the Persian Empire
Persia's conquest and absorption of the Babylonian Empire. Persia's takeover of the Lydian Empire.
Cyrus the Great and Darius the Great.
Relative peace and prosperity for its inhabitants for two centuries.
Darius the Great and Xerses the Great
The two very general factors that led to the fall of the empire are internal pressures and external pressures.The two very general factors that led to the fall of the empire are internal pressures and external pressures.The two very general factors that led to the fall of the empire are internal pressures and external pressures.The two very general factors that led to the fall of the empire are internal pressures and external pressures.The two very general factors that led to the fall of the empire are internal pressures and external pressures.The two very general factors that led to the fall of the empire are internal pressures and external pressures.The two very general factors that led to the fall of the empire are internal pressures and external pressures.The two very general factors that led to the fall of the empire are internal pressures and external pressures.The two very general factors that led to the fall of the empire are internal pressures and external pressures.
The Persian Empire was taken over by Alexander the Great nearly two thousand years earlier if you are talking about 1500 CE. If you meant 1500 BCE, the Persian Empire came into existence a thousand years later.