In the 9th century centrifugal movements commenced in the Khazar Kaghanate. One of the subject peoples, the Hungarians left its dominion and settled in the region between the rivers Don and Dniester. They abandoned the steppes and crossed the Carpathians around 896. According to the 13th-century "Gesta Hungarorum" ("Deeds of the Hungarians"), at the time of the Hungarian invasion Transylvania was inhabited by Romanians and Slavs and ruled by Gelou, "a certain Romanian", while Crişana was inhabited by several peoples, among them Székelys. Whether the author of the "Gesta" had any knowledge of the real conditions of the turn of the 9th and 10th centuries remains debated by historians.