States and territories established in the 510s

The Kingdom of the West Saxons, also known as the Kingdom of Wessex, was an Anglo-Saxon kingdom in the south of Great Britain, from around 519 until Alfred the Great declared himself as King of the Anglo-Saxons in 886.

Neustria was the western part of the Kingdom of the Franks during the Early Middle Ages, in contrast to the eastern Frankish sub-kingdom, Austrasia. It initially included land between the Loire and the Silva Carbonaria, in the north of present-day France, with Paris, Orléans, Tours, Soissons as its main cities.

Usan-guk or the State of Usan () was a statelet that occupied the island Ulleungdo and several adjacent islands in Korea during the Three Kingdoms period. According to the Samguk sagi, it was conquered by the Silla general Kim Isabu in 512. He is said to have used wooden lions or tigers to intimidate the residents into surrendering. It has been written that the alias of Usan-guk is Ulleung-do. Usan-guk rarely entered into historical records, but appears to have continued a largely autonomous existence until its loss of independence to Goryeo in 930.

Byzantine Empire from 518 to 602