Cyrus the Great vs Theodosius I

Cyrus led a rebellion against the Median Empire, defeating King Astyages and capturing Ecbatana. He then united the Persian and Median tribes, establishing the Achaemenid Empire, which became the largest empire the world had yet seen.

Cyrus defeated King Croesus of Lydia at the Battle of Thymbra. The Lydian capital Sardis was captured, and Croesus was taken prisoner. This conquest brought Anatolia under Persian control and secured access to the Aegean coast.

Cyrus the Great led the Persian army to capture Babylon without significant battle. The city's gates were opened, and Cyrus entered peacefully. This conquest added Mesopotamia to the Achaemenid Empire and marked the end of the Neo-Babylonian Empire.

After conquering Babylon, Cyrus issued a clay cylinder inscribed with a declaration. It described his policy of restoring temples, repatriating displaced peoples, and allowing religious freedom. The cylinder is often cited as an early charter of human rights.

Cyrus issued an edict allowing the Jewish exiles in Babylon to return to Jerusalem and rebuild the Temple. This event is recorded in the biblical Book of Ezra and is a key moment in Jewish history, ending the Babylonian captivity.

Theodosius I issued the Edict of Thessalonica, declaring Nicene Christianity the official state religion of the Roman Empire. All other forms of Christianity were deemed heretical, and pagan practices were increasingly suppressed.

Theodosius I ordered a massacre of thousands of citizens in Thessalonica in retaliation for the murder of a Roman general. The massacre led to his excommunication by Bishop Ambrose of Milan, and he later performed public penance.

Theodosius I issued a series of laws banning pagan worship, closing temples, and prohibiting sacrifices. The Olympic Games were abolished, and the Serapeum in Alexandria was destroyed. These actions accelerated the decline of paganism in the empire.

Theodosius I defeated the usurper Eugenius and his general Arbogast at the Battle of the Frigidus (modern River Vipava). The victory reunited the Roman Empire under a single ruler for the last time before its permanent division.

Upon his death, Theodosius I divided the Roman Empire between his two sons: Arcadius received the Eastern Empire and Honorius the Western Empire. This division became permanent, leading to the separate histories of the Byzantine and Western Roman Empires.