The main site of the Battle of Barnet in 1471, one of the two principal engagements of the Wars of the Roses, was in the parish of Monken Hadley. Yorkist troops advanced through the village, although the action took place north (Hadley Wood) and west (Hadley Green) of the settlement. Although the retreat of the forces of Lord William Hastings (at the hands of the Earl of Oxford) took place in the parish of Barnet, all of the other key engagements were within Monken Hadley parish, including the historically significant death of Richard Neville, 16th Earl of Warwick, believed to be at the place where a monument now stands on the Great North Road.