Upon the homeward return of the Norwegians, the saga declares that Hákon's "honours had been won" as a result of the expedition, and states that Hákon himself heartily thanked the men for their service overseas. The operation seems to mark a turning point in the history of the Kingdom of the Isles. Although the kings that ruled the realm before Rǫgnvaldr could afford to ignore Norwegian royal authority, it is apparent that those who ruled after him required a closer relationship with the Norwegian Crown. Even though the Norwegians acclaimed the conclusion of the campaign, its only lasting achievement was Óláfr's restoration. The Scots too may have welcomed this outcome, considering the consolidation of the Crovan dynasty after years of chaos, and Óláfr's familial relationship with Fearchar, Alexander's principal northern protégé. Nevertheless, the campaign itself may have been the gravest crisis faced by the Scots since the English invasion of Scotland in 1216. Although Scottish sources fail to note the campaign of 1230, its magnitude is revealed by English sources such as the "Chronicle of Lanercost", and the thirteenth-century "Annales de Dunstaplia", with the latter reporting that the campaigning Norwegians and Islesmen were only overcome with much labour after they had invaded Scotland and Mann and inflicted considerable casualties.