The Anglo-Saxon Chronicle for the year 946 records that Eadred "reduced all the land of Northumbria to his control; and the Scots granted him oaths that they would do all that he wanted."[3] Nevertheless, Eadred soon faced a number of political challenges to the West-Saxon hegemony in the north. Unfortunately, there are some notorious difficulties with the chronology of the events described in the historical sources, but it is clear that there were two Scandinavian princes who set themselves up as kings of Northumbria.[citation needed]