Kingdom of Dericania

The Kingdom of Dericania was a constituent Kingdom of the Holy Levantine Empire, and for much of the Empire's existence it was the seat of the Emperor of the Levantines in Corcra, where the Imperial Diet and Collegial Electorate met. Characterized by dozens, sometimes hundreds of principalities, the Kingdom of Dericania drove many of the political concerns within the Empire during the through the , including during the Great Confessional War, the Caroline Wars, and finally during the Great War, where various nationalists, liberals, and socialists attempted to achieve Derian nationhood, beginning the first phase of the conflict. These groups formed the Deric Republic to replace the ancient Kingdom apparatus with a unified wartime state.

Eastern Kingdom of the Levantines and the Empire
In 917, upon the death of the Emperor Brian III, the Levantine Empire under the Conine dynasty was partitioned into three parts, roughly corresponding to modern day Urcea, Carna, and Dericania, with the latter portion known as the Eastern Kingdom of the Levantines. Passing from the Conine dynasty to the Leonine dynasty, King Leo, reformed the Holy Levantine Empire in 965 with his conquest of the Southern Kingdom of the Levantines, reunifying most of the realm and receiving subsequent recognition of the Pope. Historians debate when the name "Dericania" entered common use for the realm, but the "Eastern Kingdom" nomenclature was largely extinct by the late 11th century. While the Emperor of the Levantines used Dericania and its crown possession, Corcra, as a successful base of power from the 10th to the 14th century, the Kingdom mostly devolved into an area with the least central authority in the Empire by the 1400s.

Renaissance Dericania
Several reasons are cited for the decline in crown power, but the fall primarily came the demise of the dependent on Imperial support and the rise of hundreds of varied dynastic estates made the Kingdom administratively unwieldy and difficulty to govern. While several attempts at reform were made in the 1490s, lack of central authority was permanently established because of the. Despite its lack of tangible political authority, Dericania was by far considered the most prestigious of the constituent Kingdoms of the Holy Levantine Empire, and a majority of Emperors of the Levantines were elected from Dericania.

Early modern Dericania
During the 19th century, the rise of Burgundie and the Southern Levantine Mediatization War lead to chaos and disorder in Dericania that would continue until its demise in the 20th century.

Late modern Dericania
The Kingdom of Dericania was dissolved with the Emperor of the Levantines relinquishing authority over it in 1935, leading to a period of fragile peace characterized by domestic chaos and infighting between former principalities. Following the end of the Great War, the former parts of the Kingdom of Dericania reformed into the Deric States, a loose confederation of many former states of Dericania which had consolidated during the war.