Igor of Kiev vs King Seongjong

Igor launched a naval attack on Constantinople. The Byzantine fleet, using Greek fire, destroyed most of Igor's ships. The campaign failed, forcing Igor to retreat and later negotiate a less favorable treaty in 944.

Following his failed campaign, Igor signed a treaty with the Byzantine Empire. The treaty renewed trade relations but imposed restrictions on Rus merchants and required Igor to provide military assistance to Byzantium.

Igor attempted to collect excessive tribute from the Drevlians, an East Slavic tribe. The Drevlians rebelled, captured Igor, and killed him by tying him to bent trees that tore his body apart. His death triggered Olga's revenge.

King Seongjong implemented a comprehensive Confucian administrative system, reorganizing the central government into three departments and six ministries. He adopted Chinese-style bureaucratic institutions and promoted Confucian scholarship as the state ideology.

Seongjong issued the Gyeongje Yukjeon, a comprehensive legal code that systematized administrative, penal, and land laws. This code provided a legal foundation for the Confucian state and remained influential for centuries.

Seongjong ordered the establishment of Confucian schools in each province and county. These hyanggyo schools provided education in Confucian classics and trained candidates for the civil service examinations, spreading Confucian values throughout the kingdom.

Seongjong launched a military campaign against Jurchen tribes in the northeast, expanding Goryeo's territory. The campaign secured the border region and established Goryeo's authority over the area, though it faced logistical challenges.