Hi Boab,Dryfe Sands, last large scale feud battle between two families. Fought on 6th December 1593 between the Maxwells (2000 off) and the Johnstons (400 off). Youngest rider on the Johnston side was a boy of 11 years old.
Johnston's lured the van of the Maxwell force into an ambush and put the rest to flight. Losses on both sides were Johnston's 120 and Maxwell's 700. The title of Warden of the West March seemed to bounce back and forth between the two families. Although bordering the eastern end of the West March, the Armstrongs were a Middle March family based in liddesdale.
George MacDonald Fraser's book "Steel Bonnet" covers this and other border family feuds as part of his history of the Anglo-Scottish Border.