Ajatashatru vs King Munmu

Ajatashatru overthrew his father Bimbisara, imprisoning him to seize the throne of Magadha. This act of patricide was condemned in Buddhist texts, but it secured Ajatashatru's rule and allowed him to pursue an expansionist policy.

Ajatashatru fortified the city of Rajagriha (modern Rajgir) with massive stone walls to protect Magadha's capital from attack. The fortifications included a new outer wall and strengthened defenses, making Rajagriha one of the strongest fortified cities in ancient India.

Ajatashatru sponsored the First Buddhist Council at Rajagriha, held shortly after the Buddha's death. Under the monk Mahakashyapa's leadership, 500 arhats recited and codified the Buddha's teachings (Sutras) and monastic rules (Vinaya), preserving them orally.

Ajatashatru waged a prolonged war against the Licchavi republic of Vaishali, eventually conquering it. He used new military technology including catapults and a siege engine. This victory expanded Magadha's territory and eliminated a rival power.

Silla forces under King Munmu (then Prince) allied with Tang China to defeat the Baekje army at Hwangsanbeol. This victory led to the fall of the Baekje kingdom, a key step toward unification.

Silla forces under King Munmu, in coordination with Tang China, defeated the Goguryeo army at the Salsu River. This victory resulted in the fall of Goguryeo, completing the unification of the Three Kingdoms under Silla.

After the fall of Goguryeo, Tang China attempted to establish control over the Korean peninsula. King Munmu led Silla forces in a war against Tang, successfully expelling Chinese forces and securing Silla's dominance over the unified territory.

King Munmu formally established the Unified Silla Kingdom after expelling Tang forces. This marked the first time the Korean peninsula was unified under a single indigenous ruler, creating a period of peace and cultural flourishing.