Battle of Harlaw, one of the bloodiest battles in Scotland, takes place.

The Battle of Harlaw, fought on July 24, 1411, was a significant conflict in Scottish history. It took place near Inverurie in Aberdeenshire, Scotland, and was primarily a clash between the forces of Donald of Islay, Lord of the Isles, and Alexander Stewart, Earl of Mar, who represented the interests of the Scottish crown.
The battle arose from a dispute over the earldom of Ross, a strategically important and wealthy region in the Scottish Highlands. After the death of the Earl of Ross, Donald of Islay, who had married the heiress of Ross, claimed the earldom. However, the Scottish crown, under King James I, supported the claim of John Stewart, Earl of Buchan, leading to a conflict of interest