First mentioned by that name in a Polish chronicle of 1321, Red Ruthenia was the portion of Ruthenia incorporated into Poland by Casimir the Great during the 14th century. The disintegration of Rus', Red Ruthenia was contested by the Grand Duchy of Lithuania (the Gediminids), the Kingdom of Poland (the Piasts), the Kingdom of Hungary and the Kingdom of Ruthenia. After the Galicia–Volhynia Wars, for about 400 years most of Red Ruthenia became part of Poland as the Ruthenian Voivodeship.