Unified Silla KingdomThe Unified Silla Kingdom (668- 935 CE) was the first dynasty to rule over the whole of the Korean peninsula. There was a state in the north at this time, Balhae(Parhae), but most of its territory was in Manchuria and so the majority of historians do not consider it a Korean state proper.The whole state was now divided into nine provinces (three in each of the old three kingdoms) and five secondary capitals. Geumseong continued as the overall capital, then known as Seorabeol, which benefitted from an extensive rebuilding programme, pleasure palaces and temples, and would
eventually boast a population of around 900,000. A whole series of administrative regions, prefectures and counties were created right down tovillage level. To consolidate the kingdom, troublesome peoples and the ruling elites of the former kingdoms were forcibly relocated and village headmen were compelled to send their eldest sons to work in the capital administration or military. The kingdom prospered due to a thriving agricultural industry, which was made more productive via extensive irrigation projects, and trade throughout the East China Sea. The prolongedabsence of war also meant that the arts and sciences flourished as never before.