24‭ August 1103: Magnus ‘Bare Legs’, King of Norway, was killed by the Irish of Ulaid in battle on this day.

King Magnus reigned as King of Norway from‭ 1093 to his untimely death in 1103, described as ambitious, his military campaigns were fought in Sweden, Wales, Scotland, Isle of Man and along the eastern coastline of Ireland. He was described as being very tall with bright yellow hair and bright blue eyes. His grandfather was Harald Hardrata, the Viking warrior king who died at the battle of Stamford Bridge, fighting the English in 1066, and his father was Olaf the Peaceful.

Having formed an alliance in‭ 1102 with Muirchertach O'Brien, King of Ireland (1086 - 1119), the arrangement being formalised by the marriage of Siguard - the 12 year old son of Magnus- to O'Briens' 5 year old daughter, Biadmaynia. The deal was for Magnus to supply man power to O'Brien to assist him in his on going local wars, and in return Magnus was to receive cattle, to provide much needed provisions for his homeward journey to Norway.

Having sailed his long boats in from Strangford Lough,‭ ‬up the river Quoile, and beaching them on Plague Island near to the present day Down Cathedral along the Ballyduggan Road, Magnus impatiently waited for the cattle to arrive on the agreed day - St. Bartholomew's Day, 23rd August 1103- but evening came and no cattle had arrived, so against the advice of his commander Eyvind Elbow he decided the next morning to leave the safety of his ships and seek out the missing cattle, believing that O'Brien had broken his promise.

Marching along the side of the tidal marshes he came to a high hill,‭ possible to the site where Dundrum Castle now stands. Looking west-wards he saw a great dust cloud, & believing that the cattle were on their way convinced himself that soon he and his men would homeward bound with supplies enough to get them there. Perhaps in a joyous mood and letting his guard slip we went to meet the approaching column but suddenly 'the trees came alive,' they were ambushed, by the 'men of Ulster.' In the ensuring battle that raged across the mud flats of the Quoile Estuary, now in total confusion, the Vikings, led by Magnus were slaughtered. 

Some of the Vikings made it back to their boats,‭ ‬leaving King Magnus and a few of his loyal guard to fight to the death. The Norse King receiving a javelin thrust through his leg and then was struck in the neck with an axe, and he died. However his famous sword 'Legbiter,' was retrieved and brought home to Norway, but the remains of its Loyal Master, and those of his loyal guard lie in a common grave on the marshes of Down. King Magnus Barefoot, nicknamed 'Barelegs,' said, "That Kings are made for honour not for long life," - and he was right in his own case for he was not yet thirty years of age when he died.

"King Magnus had a helmet on his head; a red shield, in which was inlaid a gilded lion; and was girt with the sword of Legbit, of which the hilt was of tooth (ivory), and handgrip wound about with gold thread; and the sword was extremely sharp. In his hand he had a short spear, and a red silk short cloak, over his coat, on which, both before and behind, was embroidered a lion in yellow silk; and all men acknowledged that they never had seen a brisker, statelier man."

Magnus before the battle (according to Snorri Sturluson)

Magnus was the last Norwegian king to fall in battle abroad, and he may in some respects be considered the final Viking king.