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7200 BCE: Elamite community of Chogha Bonut established.
4395 BCE: City of Susa founded in region of ancient Persia.
3000 BCE: Aryan tribes of Indo-Iranians migrate to the region, among them are Persians.
1500 BCE - 1000 BCE: Development of the religion of Zoroastrianism in region of ancient Persia.
1000 BCE: Scythians migrate from Persia into the Asian steppes.
850 BCE: Medes migrate into Iran from Asia.
750 BCE: Persians migrate into Iran from Asia.
727 BCE - 675 BCE: Medes unite during the reign of their king Dayukku (aka Deioces).
675 BCE - 640 BCE: Persians settle in Persis during the reign of their king Teispes.
628 BCE - 551 BCE: Life of Zoroaster, according to Pahlavi sources.
553 BCE: Cyrus the Great successfully rebels against the Medes and establishes the Achaemenid Empire of Persia.
550 BCE: Cyrus the Great of Persia founds the Achaemenid Empire.
550 BCE - 330 BCE: The Persian Achaemenid Empire reigns over Central Asia, Mesopotamia, Anatolia, and Egypt.
547 BCE: Phrygia becomes a Satrapy of the Persian empire.
547 BCE: Anatolia conquered by the Persians. Ephesos remains neutral.
546 BCE: The Persians occupy Cyprus, being invited by Cypriot leaders.
539 BCE: Fall of Babylon, conquered by Cyrus of Persia. Return of the Jews.
539 BCE: Cyrus the Great conquers Babylon; the Fertile Crescent is controlled by the Achaemenid Empire (The First Persian Empire).
530 BCE: Persia conquers the Indus Valley.
530 BCE - 522 BCE: Reign of Cambyses II of Persia.
525 BCE - 404 BCE: Persia conquers Egypt.
522 BCE: Darius I (Darius the Great) succeeds to the throne of Persia after the death of Cambyses II.
522 BCE: The Persian satrapy of Armenia briefly cedes from the Achaemenid Empire but is brought under control by Darius I.
520 BCE: Darius I of Persia fights the Scythians (not very successfully).
520 BCE - 325 CE: Achaemenid rule in the Gandhara region.
515 BCE: Darius I moves the capital of Persia from Pasargadae to Persepolis.
513 BCE - 512 BCE: Darius I of Persia campaigns against Scythians into European Scythia, past the Danube River, Scythians refuse to fight and Darius is forced to abandon the campaign due to lack of provisions.
499 BCE - 494 BCE: Ionian cities rebel against Persian rule.
499 BCE: Naxos is attacked by Darius' Persian forces.
498 BCE: Ionians and Greek allies invade and burn Sardis (capital of Lydia).
492 BCE: Darius I of Persia invades Greece.
490 BCE: Naxos is attacked for a second time by Persian forces.
490 BCE: Rhodes comes under Persian rule.
490 BCE: A combined force of Greek hoplites defeat the Persians at Marathon.
486 BCE: Xerxes succeeds to the throne of Persia after the death of Darius I.
485 BCE: Babylon is destroyed by Xerxes, King of Persia.
485 BCE - 465 BCE: Reign of Xerxes I (the Great) of Persia.
480 BCE: Sack of Athens by the Persians under Xerxes. The Agora is destroyed.
480 BCE: Persian forces attack the sanctuary of Delphi.
480 BCE: Persians destroy the sanctuary at Sounion.
480 BCE: Xerxes I makes extensive preparations to invade mainland Greece by building depots, canals and a boat bridge across the Hellespont.
480 BCE: Battle of Thermopylae. 300 Spartans under King Leonidas and other Greek allies hold back the Persians led by Xerxes I for three days but are defeated.
480 BCE: The indecisive battle of Artemision between the Greek and Persian fleets of Xerxes I. The Greeks withdraw to Salamis.
480 BCE: Battle of Salamis where the Greek naval fleet led by Themistocles defeats the invading armada of Xerxes I of Persia.
479 BCE: Xerxes' Persian forces are defeated by Greek forces at Plataea effectively ending Persia's imperial ambitions in Greece.
478 BCE: Sparta withdraws from alliance against Persia.
478 BCE: Xerxes I builds the Gate of All Nations, the Hall of 100 Columns and the grand Palace of Xerxes.
449 BCE: Ionian cities become independent from Persia under the Peace of Callias.
449 BCE: Peace is agreed on by Athens and Persia, sometimes referred to as the Peace of Callias.
412 BCE: Sparta allies with Persia.
401 BCE: Retreat from Persia of Xenophon and the ten thousand mercenaries.
380 BCE - 330 BCE: Life of Darius III of Persia.
341 BCE: The Persians complete conquest of Egypt.
336 BCE: Artaxerxes III builds the Hall of 32 Columns, the Palace of Artaxerxes and the Unfinished Gate.
334 BCE: Alexander invades the Persian empire.
333 BCE: Battle of Issus. Alexander is victorious against Darius III of Persia.
331 BCE: Egypt is conquered by Alexander the Great without resistance.
331 BCE: Battle of Gaugamela. Alexander calls himself "King of Asia."
330 BCE: Death of Darius III and end of the Achaemenid Empire of Persia.
330 BCE: Persian Achaemenid Empire falls to Alexander the Great.
330 BCE: Persepolis is burned and looted by Alexander the Great.
329 BCE - 327 BCE: Alexander conquers Bactria and Sogdiana.
312 BCE - 63 BCE: The Seleucid Empire replaces the Achaemenid Empire.
247 BCE - 224 CE: Empire of the Parthians.
247 BCE - 224 BCE: Parthia replaces the Seleucid Empire.
63 BCE: The Roman general Pompey defeats the Seleucid Antiochus XIII and incorporates Syria as a province of the Roman empire.
224 CE: Zoroastrianism becomes Persian state religion under the Sassanian Empire.
224 CE: Sasanians overthrow the Parthians.
224 CE - 651 CE: The Sassanian Empire replaces the Parthian Empire.
240 CE - 270 CE: Reign of Shapur I, who first brought the Sassanian empire to its peak.
260 CE: Shapur I captures the Roman emperor Valerian at Edessa.
607 CE - 627 CE: East Rome defeats Sasanian Persia.
651 CE: Sassanian Empire conquered during the Muslim Arab invasion of the 7th century CE.