Scottish Marches was the term used for the Anglo-Scottish border during the Late Middle Ages and the Early Modern era, characterised by violence and cross-border raids.
In the late 13th century Edward I of England appointed the first Lord Warden of the Marches, who was tasked with overseeing these regions and keeping their monarch's domain secure; when it was in their interests, they would encourage cross-border raiding, or even full-scale war.
[2] Especially in the Tudor period, some inhabitants of the Marches on either side of the border exhibited mixed national allegiances, and parts of the region were home to Riding Surnames or clans.
[3] The fluid nature of the border, and the frequent wars between Scotland and England, made the Marches fertile ground for many bandits and reivers who exploited the situation.
As late as the reign of Elizabeth I of England, the English considered it worth spending a fortune on the latest style of fortifications (trace italienne) to secure the town against Scottish attack.