Key Facts
- Duration
- 668–935 AD (267 years)
- Founding event
- Conquest of Goguryeo, 668 AD
- End event
- Surrendered to Goryeo, 935 AD
- Capital
- Gyeongju (Seorabeol)
- Territory
- Central and southern Korean peninsula
Imperial Zenith Metrics
Historical Trajectory
Phase I: Rise
Silla formed a strategic alliance with Tang China in the 7th century, first conquering the kingdom of Baekje in the Baekje–Tang War, then defeating Goguryeo in 668 AD after the Goguryeo–Tang War. Following a subsequent Silla–Tang War, Silla expelled Tang forces and consolidated control over the central and southern Korean peninsula, establishing the first unified Korean polity.
Phase II: Zenith
At its height, Unified Silla fostered a flourishing Buddhist culture, with Gyeongju serving as a prosperous capital adorned with temples, pagodas, and royal tombs. Trade connections with Tang China and Japan supported economic growth, while the bone-rank aristocratic system structured society. Institutions modeled on Tang administrative practices strengthened central governance across the unified territory.
Phase III: Decline
By the late 9th century, aristocratic power struggles and regional revolts weakened central authority. Breakaway states—Later Baekje and Later Goguryeo—emerged during the Later Three Kingdoms period, fragmenting the peninsula. Internal unrest intensified until King Gyeongsun surrendered peacefully to Wang Geon of Goryeo in 935, ending Unified Silla and transferring legitimacy to the new Goryeo dynasty.
Notable Imperial Reigns
Selected rulers mapping the empire’s trajectory