Njáls saga states that a pair of brothers, BróÃ°ir and Óspak, fought on opposite sides in a decisive battle in this region. In the 1630s, a group of friars compiled a comprehensive history of this 
Njáls saga states that a pair of brothers, BróÃ°ir and Óspak, fought on opposite sides in a decisive battle in this region. In the 1630s, a group of friars compiled a comprehensive history of this region called the Annals of the Four Masters. Vikings built a settlement in this region at an ecclesiastical site and named it for a local term meaning "Black Pool." The Song of Dermot and the Earl recounts the conquest of this region by Strongbow, who helped established control over part of this region that called (*) The Pale by Normans. An anonymous 11th century scholar gave this region a storied history in the Book of Invasions. Vikings were largely expelled from this region after a victory at the Battle of Clontarf by Brian Boru, who was one of this region's High Kings. For 10 points, identify this island which was captured by England under Henry II.
Njáls saga states that a pair of brothers, BróÃ°ir and Óspak, fought on opposite sides in a decisive battle in this region.
Ireland [accept Isle of Man until "Annals"; accept any specific region of Ireland]