The men of the Isles , accompanied by forces from the Kingdom of Dublin , were commanded Control by Somairle mac Gilla Brigte , King of the Isles .

Somairle was slain Killing in the encounter Hostile_encounter , apparently by local levies , and his forces were routed Destroying .

Somairle first appears Presence on record in the 1150s , when he is stated Statement to have supported Supporting the cause of Máel Coluim mac Alasdair in a rebellion Change_of_leadership against Malcolm IV , King of Scotland .

Máel Coluim was a member of a rival branch of the Scottish royal family , and his sons were closely related to Somairle .

At about the time of the rebellion Change_of_leadership 's collapse , Somairle appears Presence to have shifted Change his energies from Scotland towards the Isles .

Two years later , Somairle decisively defeated Conquering Guðrøðr , gaining Getting complete control Control of the kingdom .

The reasons for Somairle 's invasion Attack of Scotland are uncertain .

This region had previously been occupied Control by the Gall Gaidheil , a people of mixed Scandinavian and Gaelic ethnicity , like Somairle himself .

Somairle may have also invaded Attack the region in an attempt to counter Hostile_encounter a perceived threat that the Scots posed to his authority in the Firth of Clyde .

As a result of Somairle 's death Death in battle Hostile_encounter , the Kingdom of the Isles fractured Destroying once again .