In A.D.864 according to the Four Masters, 867 according to O'Flaherty, the Danes were defeated at Lough Foyle, by Hugh Finnliath, King of Ireland.

Soon after, Leinster and Munster were plundered by a Scandinavian chief, named Baraid, who advanced as far as _Ciarraighe_ (Kerry): "And they left not a cave under ground that they did not explore; and they left nothing, from Limerick to Cork, that they did not ravish." What treasures the antiquarian of the nineteenth century must have lost by this marauder! How great must have been the wealth of the kings and princes of ancient Erinn, when so much remains after so much was taken! In 877 the Black Gentiles took refuge in Scotland, after suffering a defeat in an engagement with the White Gentiles.

They were, however, consoled by a victory over the men of Alba, in which Constantine, son of Kenneth, was slain, and many others with him.

Their success proved beneficial to Ireland, for we are told that a period of "rest to the men of Erinn" ensued.

The Danes still held their own in Dublin and at Limerick, occasionally plundered the churches, and now and then had a skirmish with the "men of Erinn;" but for forty years the country was free from the foreign fleets, and, therefore, enjoyed a time of comparative quiet.
In the year 913 new fleets arrived.