The Battle of Dail-Riabhach was a Scottish clan

Scottish clan

Scottish clans , give a sense of identity and shared descent to people in Scotland and to their relations throughout the world, with a formal structure of Clan Chiefs recognised by the court of the Lord Lyon, King of Arms which acts as an authority concerning matters of heraldry and Coat of Arms...

 battle that took place in the year 1576. It was fought between members of the Highland Clan MacKay

Clan MacKay

Clan Mackay is an ancient and once powerful Scottish clan from the far north of the Scottish Highlands, but with roots in the old kingdom of Moray. They were a powerful force in politics beginning in the 14th century, supporting Robert the Bruce. In the centuries that followed they were...

, with the involvement of John Sinclair, 5th Earl of Caithness, chief of the Clan Sinclair

Clan Sinclair

Clan Sinclair is a Highland Scottish clan of Norman origin who held lands in the north of Scotland, the Orkney Islands, and the Lothians which they received from the Kings of Scots...

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An account of the battle was written in the book Conflicts of the Clans published by the Foulis Press in 1764, taken from a manuscript from the time of King James VI of Scotland (1566–1625):

The year of God 1576, Y Roy Mackay of Strathnaver dying, there arose civil dissension in Strathnaver betwixt John Mackay (the son of Y Roy) and Neil Nawerigh (the said Y Roy's brother).