Achaemenid Empire | Neutreality

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Achaemenid Empire

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Timeline

553 BCD
The Persian king Cyrus II revolts against the Median king Astyages

538 BCD
Babylon is conquered
Exiled people are allowd to return to their lands

525 BCD
Egypt is conquered

550 BCD
Cyrus II "the Great"
founds the empire and becomes its ruler

530 BCD
Cambyses II
becomes the ruler

522 BCD
Darius I “the Great”
becomes the ruler

490 BCD
Defeat at Marathon

404 BCD
Artaxerxes II
becomes the ruler

359 BCD
Artaxerxes III
becomes the ruler

480 BCD
Xerxes invades Greece

486 BCD
Xerxes I
becomes the ruler

424 BCD
Xerxes II
becomes the ruler

465 BCD
Artaxerxes I
becomes the ruler

423 BCD
Darius II
becomes the ruler

387 BCD
The King's Peace
of Antalcidas

402 BCD
Battle of Cunaxa

338 BCD
Arses (Artaxerxes IV)
becomes the ruler

336 BCD
Darius III
becomes the ruler

343 BCD
Egypt reconquered

330 BCD
Alexander "the Great"
conquers the empire

What is the Achaemenid empire?
The first Persian empire.
Founded and ruled by a single dynasty, for 220 years between 550 BCE - 330 BCE.

It was the largest empire in the ancient world and is considered the first true world empire due to it being the first to control a huge continuous territory across multiple major civilizations and manage it as a single imperial system.

How did it start?
Cyrus the Great revolted against the Medes and defeated them around 550 BCE.

The Medes treated the Persians as subordinate contributors rather than partners.
When Median elite unity weakened, Cyrus rebelled against the Median king Astyages for he had both the opportunity and the support to replace it with a more stable order.

This was followed by a rapid expansion through conquest and diplomacy, while allowing local cultures and religions to continue. This combination of military strength and pragmatic rule turned a minor regional power into the first great Persian Empire.

How did it end?
Alexander the Great invaded from Macedonia between 334 BCE - 330 BCE.

He defeated Persian forces in a series of decisive battles, exploiting weaknesses in command coordination rather than manpower.

It shattered Persian control in Anatolia and proved that Persian provincial forces could not stop Alexander’s army. It also undermined the authority of Persian satraps before Darius even intervened.

Alexander’s first major battle against Persia, fought in Asia Minor against local satrapal forces rather than the Great King himself. The Persians positioned cavalry along a riverbank, expecting the river to break the Macedonian attack. Alexander crossed anyway, attacked directly, and won through superior cavalry coordination and elite infantry support.It shattered Persian control in Anatolia and proved that Persian provincial forces could not stop Alexander’s army. It also undermined the authority of Persian satraps before Darius even intervened.

Alexander faced Darius III personally for the first time. The battlefield was narrow, neutralizing Persia’s numerical advantage. Alexander focused his attack on the Persian center, broke through, and forced Darius to flee.Darius’ flight was a psychological catastrophe for Persian legitimacy. The Great King abandoning the field signaled that the empire’s supreme authority could be defeated directly, triggering defections and revolts across the western empire.

This battle effectively ended Achaemenid resistance. After Gaugamela, Babylon, Susa, and Persepolis fell in succession. The empire’s administrative system collapsed not from destruction, but from the loss of royal legitimacy.

Alexander then captured the imperial capitals, including Persepolis.
The last king Darius III fled east and was killed by his own nobles, removing central legitimacy.
With no king to rally around, imperial governors surrendered piecemeal, and Alexander absorbed the empire largely intact, even keeping much of its administrative structure.

The Rulers

Who was he?
Founder of the Achaemenid Empire.
Ruled for 29 years between - 559 BCE - 530 BCE.

Born in Persia to Cambyses I the Persian king of Anshan and princess Mandane daughter of Astyages king of the Medes.

Lived for 45 years from 585 BCE until dying in 530 BCE while campaigning on the empire’s eastern frontier, with details uncertain.

What did he do?

United the Persian tribes and founded the Achaemenid Empire.
Expanded into Central Asia to secure the empire’s frontiers.
Promoted tolerance and local autonomy under Persian rule and allowed exiles to return and rebuild temples.
Built Pasargadae as a royal capital and left a lasting imperial model.

Who was he?
The third ruler of the Achaemenid empire
for 36 years between 522 BCE - 486 BCE.

After the death of Cambyses, the empire fractured under a claimant known as Bardiya (or Gaumata). Darius was a high-ranking noble and led a coup that killed the claimant and seized the throne.

Lived for 72 years from 558 BCE until he died naturally in 486 BCE.

Died naturally in 486 BCE.

What did he do?

Satrapy system
Formalized with defined jurisdictions and assessed taxation.
Separation of powers
(civil satrap, military commander, treasurer).
Standardized
Taxation, weights, measures, and coinage (gold darics, silver sigloi).
Expanded territory to secure frontiers and trade routes
Expanded State infrastructure
(Royal Road, courier system).
Multiple capitals used deliberately
(Susa, Persepolis, Babylon, Ecbatana).

What did he do?

United the Persian tribes and founded the Achaemenid Empire.
Expanded into Central Asia to secure the empire’s frontiers.
Promoted tolerance and local autonomy under Persian rule and allowed exiles to return and rebuild temples.
Built Pasargadae as a royal capital and left a lasting imperial model.

What did he do?

United the Persian tribes and founded the Achaemenid Empire.
Expanded into Central Asia to secure the empire’s frontiers.
Promoted tolerance and local autonomy under Persian rule and allowed exiles to return and rebuild temples.
Built Pasargadae as a royal capital and left a lasting imperial model.

What did he do?

United the Persian tribes and founded the Achaemenid Empire.
Expanded into Central Asia to secure the empire’s frontiers.
Promoted tolerance and local autonomy under Persian rule and allowed exiles to return and rebuild temples.
Built Pasargadae as a royal capital and left a lasting imperial model.

What did he do?

United the Persian tribes and founded the Achaemenid Empire.
Expanded into Central Asia to secure the empire’s frontiers.
Promoted tolerance and local autonomy under Persian rule and allowed exiles to return and rebuild temples.
Built Pasargadae as a royal capital and left a lasting imperial model.

What did he do?

United the Persian tribes and founded the Achaemenid Empire.
Expanded into Central Asia to secure the empire’s frontiers.
Promoted tolerance and local autonomy under Persian rule and allowed exiles to return and rebuild temples.
Built Pasargadae as a royal capital and left a lasting imperial model.

What did he do?

United the Persian tribes and founded the Achaemenid Empire.
Expanded into Central Asia to secure the empire’s frontiers.
Promoted tolerance and local autonomy under Persian rule and allowed exiles to return and rebuild temples.
Built Pasargadae as a royal capital and left a lasting imperial model.

Achaemenid_Empire_Expansion_Map_edited.j

A map of the Achaemenid Empire expansion
(With the locations of modern day capitals)

How do we know?

When?
Ancient people did count time, just not using the modern BCE/CE system, which was created much later as a labeling convention.

Events were dated by regnal years of kings, local calendars, and carefully recorded astronomical phenomena. Modern historians reconstruct BCE dates by linking these regnal chronologies together, cross-checking thousands of dated administrative documents, and anchoring them to precise astronomical events such as eclipses that can be calculated backward with certainty.

Once a single date is fixed absolutely, the surrounding timeline locks into place, allowing events to be dated with high confidence.
Where?
How?
Why?