Xerxes I

Xerxes completed the construction of the Gate of All Nations at Persepolis, a grand entrance hall adorned with reliefs of delegates from across the empire. This project symbolized the unity and diversity of the Achaemenid Empire under his rule.

Xerxes crushed a major revolt in Babylon, destroying the city's fortifications and melting down the golden statue of Bel-Marduk. This action ended Babylonian autonomy and solidified Persian control over Mesopotamia.

Xerxes I led a massive Persian army and navy across the Hellespont into Greece. The invasion included the battles of Thermopylae, Artemisium, and the sack of Athens, but ended in defeat at Salamis and Plataea, marking the peak and decline of Persian expansion into Europe.

Xerxes' forces defeated a small Greek force led by King Leonidas at the pass of Thermopylae. The Persian army advanced into central Greece, but the Greek resistance delayed the invasion and became a symbol of defiance.

Xerxes' Persian fleet was decisively defeated by the Greek navy under Themistocles in the narrow straits of Salamis. The loss crippled Persian naval power and forced Xerxes to retreat to Asia, leaving his army in Greece to be defeated later.

Xerxes was assassinated in his bedchamber by Artabanus, the commander of the royal guard, possibly with the involvement of Xerxes' son Artaxerxes. The murder led to a succession crisis and the eventual rise of Artaxerxes I.