26 July 2019
King James IV of Scotland declared war on England on 26 July 1513.
On 26 July 1513, King James IV of Scotland declared war on England after England's King Henry VIII invaded France. James was responding to French pleas for military aid from Scotland and also took the opportunity to try to take revenge for England's seizure of Scottish ships and partial non-payment of the marriage dowry of James's wife Margaret Tudor.
After invading Northumbria, the war went badly for James and less than two months later, he was killed at the Battle of Flodden Field - the last British monarch to die in battle.
James IV by Norman MacDougall