The Battle of Flodden or Flodden Field or occasionally Battle of Branxton (Brainston Moor) was a conflict between the Kingdom of England and the Kingdom of Scotland. The battle was fought 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. It was a decisive English victory. In terms of troop numbers, it was the largest battle fought between the two Kingdoms.