Bannockburn left northern England open to attack and in the years that followed many communities in the area became closely acquainted with the 'Blak Dowglas.' Along with Randolph, Douglas was to make a new name for himself in a war of mobility, which carried Scots raiders as far south as Pontefract and the Humber. But in a real sense this 'war of the borders' belonged uniquely to Douglas, and became the basis for his family's steady ascent to greatness in years to come. War ruined many ancient noble houses; it was the true making of the house of Douglas. The tactics used by Douglas were simple but effective: his men rode into battle – or retreated as the occasion demanded – on small horses known as hobbins, giving the name of 'hobelar' to both horse and rider. All fighting, however, was on foot. Scottish hobelars were to cause the same degree of panic throughout northern England as the Viking longships of the ninth century.