Battle of Glenmama

Although nineteenth century scholars, including John O’Donovan and Todd, and especially the Dunlavin-based clergyman John Francis Shearman (in 1830) were tempted to locate the battle-site in the vicinity of Dunlavin, Co Wicklow, within their lifetime the theory was disputed by Goddard Orpen, and were disproved by Joseph Lloyd in 1914 and subsequently by Albha mac Gabhrain who located the battle site beside Ardclough on the Dublin-Kildare border in 1914 (the Irish form of Dunlavin is in reality Dun Luadhain). it seems reasonable to seek a location close to the perimeter of the Hiberno-Norse kingdom of Dublin. On that account, the suggestion of Lloyd, which places the battle at a gap now crossed by the Naas Road on the section between Kill and Rathcoole, is still worthy of consideration. In any event, the engagement took place within an easy day’s march of Dublin, as Brian pressed on immediately afterwards to reach the town on the following day. ==Background==

In 997, at a royal meeting near Clonfert, Brian Boru, King of Munster, met with his long-time rival Máel Sechnaill mac Domnaill, who was at the time High King of Ireland. The Irish High Kingship in the 10th century denotes a king who had enforced his power over external territories. Máel Sechnaill assumed the Irish high-kingship after the Battle of Tara in 980. The two kings made a truce, by which Brian was granted rule over the southern half of Ireland, while Máel Sechnaill retained the northern half and high kingship. In honour of this arrangement, Máel Sechnaill handed over to Brian the hostages he had taken from Dublin and Leinster; and in 998, Brian handed over to Máel Sechnaill the hostages of Connacht. In the same year, Brian and Máel Sechnaill began co-operating against the Norse of Dublin for the first time. Late in 999, however, the Leinstermen, historically hostile to domination by either the Uí Néill overkings or the King of Munster, allied themselves with the Norse of Dublin and revolted against Brian. According to the 17th century Annals of the Four Masters, the following prophecy had predicted the Battle of Glenmama: ==Battle==

The Annals of the Four Masters records that Brian and Máel Sechnaill united their forces, The Munster-Meath army defeated the Leinster-Dublin army. Later historians have also seen the battle as decisive. The sources point to high mortality on both sides. According to the Annals of Innisfallen, which represents a Munster perspective, "formna Gall herend" ('the best part of the foreigners of Ireland') fell therein. The more partisan Cogad Gáedel re Gallaib indulges in hyperbole, claiming that "since the Battle of Mag Rath to that time there had not taken place a greater slaughter". The fallen included Harald son of Amlaib (a brother of Sitriuc Silkbeard) and "other nobles of the foreigners", amongst whom was one Cuilén son of Eitigén, who apparently belonged to the Gailenga; he may have been a brother of Ruadacán son of Eitegén, king of Airther Gaileng, who died in 953. On Brian's side, even the Cogadh acknowledges that "there fell many multitudes of the Dál Cais," but no details are provided. It says the battle was "bloody, furious, red, valiant, heroic, manly; rough, cruel and heartless;" and that there had been no greater slaughter since the seventh century Battle of Magh Rath. Ó Corráin refers to it as a "crushing defeat" of Leinster and Dublin, Tradition records that "the son of the King of the Danes", Harold Olafsson, was killed in the retreat, and was interred at the now obscure cemetery of Cryhelpe. Brian took Máel Mórda of Leinster prisoner and held him until he received hostages from the Leinstermen. This was at a time when warfare was fought on a very limited scale, and raiding armies generally had between a hundred and two hundred men. Most importantly, the defeat left the road to Dublin "free and unimpeded for the victorious legions of Brian and Maelsechlainn". ==Sack of Dublin==

The victory was followed up with an attack on the city of Dublin. The 12th century Cogadh Gaedhil re Gallaibh gives two accounts of the occupation: that Brian remained in Dublin from Christmas Day until Epiphany (6 January), or from Christmas Day until St. Brigid's Day (1 February). According to the much more reliable Annals of the Four Masters and the Chronicon Scotorum, Dublin was only occupied for a week by Munster forces. According to the account Brian, having plundered the dún (fortress), entered the margadh (market area) and here seized the greatest wealth. Meanwhile, on the approach of the Munster forces, King Sitriuc had fled northward hoping to obtain asylum among the Ulstermen. His ally, Máel-mórda of Uí Faeláin, was captured, in ignominious circumstances according to Cogad Gáedel re Gallaib. ==Aftermath==

The kingship of Leinster was bestowed upon the Uí Dunchada candidate, Dunchad son of Domnail, who retained this status until he was deposed in 1003. Sigtrygg Silkbeard returned having found no asylum in the north. The annal accounts concur that he, too, yielded hostages to Brian while the Annals of Innisfallen add that Brian in a suitable magnanimous gesture, "gave the fort (dún) to the Foreigners." Ailbhe Mac Shamhráin Since Sigtrygg could find no refuge in Ireland, he eventually returned, submitted to Brian, gave hostages and was restored to Dublin. In the meantime, Sigtrygg may have temporarily "turned pirate" and been responsible for a raid on St David's in Wales. Brian in turn took as his second wife Sigtrygg's mother, the now three-times-married Gormflaith. However, Sigtrygg never forgot the insult of the Ulaid, and in 1002 he had his revenge when his soldiers served in Brian's campaign against the Ulaid and ravaged their lands. felt obliged to submit and a new political order was created. The capitulation of the king of Tara left Brian as the most powerful king in Ireland – the first non Uí Néill king to achieve such prominence. Ailbhe Mac Shamhráin wrote: Glenn Máma gave Brian a psychological advantage over the king of Tara and increased his readiness to break the Agreement of Clonfert. As a result of the battle, he had achieved domination, in a meaningful sense, of Leinster and Dublin. Through achieving effective dominance of Dublin, Brian acquired a military (aside from a psychological) advantage over Máel Sechnaill, which helped him in his endeavours to reach beyond the lordship of Leth Moga. His success in this regard was probably instrumental in tying Dublin into the sphere of Leth Moga for at least a century to follow. ==See also==