States and territories established in the 910s

independent medieval kingdom in the northwest of the Iberian Peninsula (910–1230), capital León

Goryeo (; ) was a Korean state founded in 918, during a time of national division called the Later Three Kingdoms period, that unified and ruled the Korean Peninsula until the establishment of Joseon in 1392. Goryeo achieved what has been called a "true national unification" by Korean historians as it not only unified the Later Three Kingdoms but also incorporated much of the ruling class of the northern kingdom of Balhae, who had origins in Goguryeo of the earlier Three Kingdoms of Korea. According to Korean historians, it was during the Goryeo period that the individual identities of Gogurye

kingdom in Iberia

former European sovereign state, then dukedom of France

duchy of Holy Roman Empire (909-1268)

one of the Ten Kingdoms of 10th-century China, centered on Guangdong Province

series of Hindu-Buddhist kingdoms that once ruled some parts of the volcanic island of Bali

theme of the Byzantine Empire

short-lived dynasty near present-day Beijing