What happened to Hadrian's Wall after the Fall of the Roman Empire?

Hadrian’s Wall is one of the most famous Roman fortifications to have survived the fall of the Roman Empire in the 500s. For about three centuries it served as a defensive line and system of power projection along the northern frontier of Roman Britain. But what happened to it after the Romans left Britain in 410?
This is when Britain began to enter the early Middle Ages, and when Britain began to experience mass migration over a period of about three hundred years from Ireland, and Central Europe. The new comers were Angles, Saxons, and Jutes, among others. If King Arthur really did exist, and if the Battle of Badon really did happen around the mid sixth century, this was his word. What role did Hadrian’s Wall play in it?
SOURCES
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