John Erskine of Dun, 4th Laird Of Dun

Battle of Flodden From Wikipedia

The Battle of Flodden, Flodden Field, or occasionally Branxton (Brainston Moor[4]%29 was a military combat in the War of the League of Cambrai between the Kingdom of England and the Kingdom of Scotland, resulting in an English victory. The battle was fought in Branxton in the county of Northumberland in northern England on 9 September 1513, between an invading Scots army under King James IV and an English army commanded by the Earl of Surrey.[5] In terms of troop numbers, it was the largest battle fought between the two kingdoms.[6] James IV was killed in the battle, becoming the last monarch from the British Isles to die in battle.