Cogad Gáedel re Gallaib

Cogad Gáedel re Gallaib (English: The War of the Gaedhil with the Gaill or The War of the Irish with the Foreigners) is a medieval Irish text that tells of the depredations of the Vikings and Uí Ímair dynasty in Ireland and the Irish king Brian Boru's great war against them, beginning with the Battle of Sulcoit in 967 and culminating in the Battle of Clontarf in 1014, in which Brian was slain but his forces were victorious. The chronicle, which compares King Brian to Augustus and Alexander the Great, was written in the early twelfth century, at least a hundred years after the events it describes.


Based on internal evidence and on the nature of the text's allusions to Brian's great-grandson Muirchertach Ua Briain (d. 1119), it has been suggested that the work was composed sometime between 1103 and 1111.[1] Cogad Gáedel re Gallaib has been found in three texts. These three are the Books of Leinster c. 1160 C.E., the Dublin Manuscript dated to the 14th century and the Brussels Manuscript from 1635.[2]

Characterization of Brian and the Foreigners

The author makes extensive use of long, elaborate passages that describe and highlight the contrast between the Irish king Brian and the foreign army he wars against. Brian and his followers are described in terms of their virtue and courage, often emphasising their Christian background and piety:

But on the other side of that battle were brave, valiant champions; soldierly, active, nimble, bold, full of courage, quick, doing great deeds, pompous, beautiful, aggressive, hot, strong, swelling, bright, fresh, never weary, terrible, valiant, victorious heroes and chieftains, and champions, and brave soldiers, the men of high deeds, and honour, and renown of Erinn...[3]

The text goes on to say that Brian and his Dál Cais are comparable to Augustus and Alexander the Great, even going on to suggest that Brian's son Murchadh "was the metaphorical Hector of all-victorious Erinn, in religion, and in valour, and in championship, in generosity, and in munificence."[4] The text draws heavily on figures of mythology and the Bible, attributing characteristics of Hercules and Samson to Murchadh.

In contrast with the lavish praise bestowed on the Dál Cais, the text describes the Vikings with vehemence and condemnation, though in terms no less hyperbolic:

Now on the one side of that battle were the shouting, hateful, powerful, wrestling, valiant, active, fierce-moving, dangerous, nimble, violent, furious, unscrupulous, untamable, inexorable, unsteady, cruel, barbarous, frightful, sharp, ready, huge, prepared, cunning, warlike, poisonous, murderous, hostile Danars; bold, hard-hearted Danmarkians, surly, piratical foreigners, blue-green, pagan; without reverence, without veneration, without honour, without mercy, for God or for man.[5]

The text's censure of the foreigners elevates the Irish and Brian even further, setting up a striking difference in moral and religious character between the two groups.

Political purpose

The main purpose of the chronicle seems to be to eulogise Brian Boru and thereby to show that the record of achievements of Brian's Dál Cais dynasty proved that they deserved Ireland's high kingship. This was an issue because the Ua Briain sept of the Dál Cais was struggling to remain High Kings of Ireland at the time of the chronicle's writing.

There are similarities to a part of the Icelandic Njal's saga, which was composed in about 1280. In 1954 the scholar Einar Olafur Sveinsson postulated the incorporation into Njal's saga of a slightly earlier and lost thirteenth-century Icelandic saga, Brjánssaga ("Brian's Saga") The relations between the accounts remains a matter of debate, and all the Icelandic written sources are considerably later that the chronicle.

The chronicler of Cogad Gáedel re Gallaib depicts the Vikings as vicious barbarians and suggests that the Dubliners are like their ancestors. In short, it may have been partly an attempt to "put the Dubliners in their place."[6]

Modern scholars consider Cogad Gáedel re Gallaib to be a piece of "brilliant propaganda" written in a "bombastic style and full of patriotic hyperbole." Although the chronicle remains a valuable source of information about the Viking Age in Ireland, its accuracy is uncertain.[7]

Comparable works include the earlier Fragmentary Annals of Ireland and the later Caithréim Chellacháin Chaisil.

Structure and principal characters

The narrative of the Cogad actually begins with the arrival of the tyrannical Ivar of Limerick,[8] this only after a long introduction, the "first part" of the chronicle, which is composed primarily of valuable annalistic material taken from sources mostly no longer extant today.[9]

The Munster section comprises a full quarter of the Cogad in total and a third of the narrative proper. The principal characters are:

The tale then introduces the Dal Cais clan and the sons of Cennedigh, Mathgambhain and Brian Boru. The lives and politics of both brothers are outlined including their numerous interactions with the 'foreigners'. Brian Boru's military aspirations are realised when he defeats the Ulaid of Aed O'Neill to gain control over Ulster. (LXXVII) Brian Boru and his army defend Dublin against the invaders and drive them back into the sea. (CX) Finally, Brian Boru dies at the hands of the Earl Brodar whom Brian manages to fatally wound. (CXIV)


Edition and translation

References and further reading

  • Holm, Poul. "Between apathy and antipathy: the Vikings in Irish and Scandinavian history." Peritia 8 (1994): 151–69.
  • Ní Mhaonaigh, Máire. "Some Middle Irish declensional patterns in Cogad Gáedel re Gallaib." Zeitschrift für celtische Philologie 49 (1997): 615–28.
  • Ní Mhaonaigh, Máire. "Cogad Gáedel re Gallaib and the Annals: a comparison." Ériu 47 (1996): 101–26.
  • Ní Mhaonaigh, Máire. "The date of Cogad Gáedel re Gallaib." Peritia 9 (1995): 354–77.
  • Ni Mhaonaigh, Maire. "Bréifne bias in Cogad Gáedel Re Gallaib." Ériu 43 (1992): 135–58.
  • Nic Ghiollamhaith, Aoife. "Dynastic warfare and historical writing in North Munster, 1276–1350." Cambridge Medieval Celtic Studies 2 (1981): 73–89.