Good. It is important to show your sincerity in dealing with the problem. You sail first to Orkney, where you are shocked to hear of Ewen's betrayal. He and others have sold out to the Scottish Crown.
You sail on to Skye, where you meet with the King of Man and your trusted ally Duguld MacRuari. You deploy all the armies you can find, then attempt to negotiate with Alexander III.
Attempts at negotiating fail, Alexander III, King of Scots is adamant at destroying the Norse hold of the western seaboard. You are forced to fight.
In 1263, you face his wrath at the Battle of Largs. He has grown incredibly impatient and wants to end more than two decades of tension here and now.
You are at a major disadvantage. The weather is unfavourable, forcing you on-shore for a land battle. You are also left grossly outnumbered. Once again, you're let down by dishonourable allegiances between those you thought you could trust and the enemy – the King of Scots.