The Achaemenid Empire was the second Persian Empire but the one which firmly defined the Persian identity. Founded by Cyrus the Great in 550 BCE, it ruled over Western Asia, conquering the Neo-Babylonian Empire in its entirety, annexing Egypt, and reaching as far as Greece.
Around 524 BCE during his conquest of Egypt, Emperor Cambyses II sent an army of 50,000 soldiers to destroy the Oracle of Amun in Siwa, but it was buried in a sandstorm in the Isolated Desert. In 522 BCE, Cambyses was usurped by Gaumata. With the support of Proto-Templars, Gaumata was defeated and overthrown by Darius I.
In what became known as the Greco-Persian Wars, the Persians attempted twice to subjugate the rebellious Greeks in the first half of the 5th century BCE. In 465 BCE, Emperor Xerxes I was assassinated by Darius in what became the first recorded usage of the Hidden Blade.
After Xerxes' death, his eldest son Artaxerxes I succeeded him as Emperor, reigning from 465 BCE. During the 420s BCE, his younger brother, Hystaspes, plotted his assassination, hiring Darius to poison the emperor. Artaxerxes survived the assassination attempt however, but not without losing his vision. Faking his death, Artaxerxes fled to Greece, and sought refuge in the city of Megaris.
The Achaemenid Empire ultimately fell to the might of Alexander the Great of Macedon in 330 BCE, but the restive locals assisted Iltani of the Babylonian Brotherhood in poisoning Alexander to death.
- Assassin's Creed II (mentioned only)
- Assassin's Creed: Initiates (mentioned only)
- Assassin's Creed Chronicles: India (mentioned only)
- Assassin's Creed: Origins (mentioned only)
- Assassin's Creed: Odyssey (first appearance)