King David vs Theodosius I

After Saul's death, David was anointed king over the tribe of Judah at Hebron. This began a seven-year period of civil war with Ish-bosheth, Saul's son, who ruled the northern tribes, leading to the eventual unification of Israel.

David led his army to capture the Jebusite fortress of Jerusalem, making it the capital of the united kingdom. He brought the Ark of the Covenant there, establishing the city as both the political and religious center of Israel.

David fought several campaigns that decisively defeated the Philistines, including the Battle of Baal-perazim. He captured Gath and other Philistine strongholds, ending their dominance over Israel and securing the kingdom's borders.

David committed adultery with Bathsheba and arranged the death of her husband Uriah the Hittite in battle. The prophet Nathan confronted David, leading to his repentance but also to divine punishment, including the death of their first child.

David's son Absalom led a rebellion that forced David to flee Jerusalem. David's forces under Joab defeated Absalom's army in the Forest of Ephraim, and Absalom was killed. David returned to Jerusalem but the kingdom was weakened.

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.