 In Lǫgmaðr's case, his participation may have been a direct after-effect of Magnús' conquest of the Isles in 1098, or the aforesaid later revival of Uí Briain encroachment in Dublin and the Isles.If Lǫgmaðr was indeed a crusader, it is uncertain which particular crusade he undertook.One possibility is that he took part in the First Crusade, a movement that reached its climax with the successful siege and capture of Jerusalem in mid 1099.