Gyeon Hwon vs Otto I the Great

Gyeon Hwon, a former Silla general, led a rebellion and established the kingdom of Later Baekje in southwestern Korea. He declared himself king, reviving the name of the ancient Baekje kingdom and initiating the Later Three Kingdoms period.

Gyeon Hwon's forces were defeated by the Goryeo army under King Taejo at Gochang. This battle marked a turning point in the Later Three Kingdoms period, weakening Later Baekje and strengthening Goryeo's position.

Gyeon Hwon was deposed by his son, Gyeon Singeom, who seized the throne in a coup. The rebellion was fueled by Gyeon Hwon's favoritism toward his youngest son, leading to internal strife within Later Baekje.

After being deposed, Gyeon Hwon defected to Goryeo and was welcomed by King Taejo. He provided military intelligence and assistance to Goryeo, contributing to the eventual conquest of Later Baekje in 936.

Gyeon Hwon died in Goryeo shortly after the fall of Later Baekje. His death marked the end of the Later Three Kingdoms period and the unification of Korea under Goryeo.

Otto married Adelaide, the widowed queen of Italy, after intervening in Italian politics. This marriage gave him control over the Kingdom of Italy and strengthened his claim to imperial authority.

Otto led a German army to defeat the Magyar (Hungarian) forces at the Lechfeld near Augsburg. This victory ended Magyar raids into Western Europe and secured Otto's reputation as a defender of Christendom.

Pope John XII crowned Otto I as Holy Roman Emperor in Rome, reviving the imperial title in the West. This event established the Holy Roman Empire as a major political entity and linked German kingship with papal authority.