Ashoka the Great vs Theodosius I

Ashoka launched a brutal conquest of the Kalinga region (modern Odisha). The war caused massive casualties, with over 100,000 killed and 150,000 deported. The suffering witnessed during this campaign led Ashoka to renounce military conquest and embrace Buddhism.

After the Kalinga War, Ashoka converted to Buddhism under the guidance of Buddhist monks. He adopted the principle of Dhamma (righteous law) and began promoting non-violence, vegetarianism, and religious tolerance throughout his empire.

Ashoka ordered the carving of edicts on pillars and rocks across the Indian subcontinent. These inscriptions, written in Prakrit and other languages, proclaimed his policies of non-violence, social welfare, and religious harmony. They are the earliest deciphered written records from ancient India.

Ashoka convened the Third Buddhist Council at Pataliputra to resolve doctrinal disputes within the Buddhist monastic community. The council standardized the Buddhist canon (Tripitaka) and decided to send missionaries abroad, including to Sri Lanka and Southeast Asia.

Ashoka built thousands of stupas and monasteries across his empire, including the Great Stupa at Sanchi. These structures became centers of Buddhist worship and pilgrimage, spreading Buddhist art and architecture throughout Asia.

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.