The subsequent attempt by King Richard to lessen the power in the north of the two families, (the Crown had few estates in the North to counterbalance those of the noble families), caused both Percies and Nevilles to back Henry Bolingbroke to become King Henry IV of England in 1399. Percy power over the wardenships was restored and the Nevilles were also rewarded, although less so. The rise of the Percies was stopped, however, in 1402 when they rebelled against Henry, (partly because of the rewards garnered by the Nevilles), and they never really recovered their position thereafter. The Earl of Westmorland, who had fought against the Percies at the Battle of Shrewsbury, where the Percies were defeated, was rewarded with the wardenship of the West March. Although the Percy family still dominated Northumberland through their landed interests, (and in 1449 one of them was made Lord Egremont and another, in 1452, was made Bishop of Carlisle), in most of Cumbria the Nevilles were the greater force : the Dacres and Greystokes followed the Neville interest (Thomas Dacre, 6th Baron Dacre married the third daughter of the 1st Earl of Westmorland).
