On 07 Jul 1399 Edmund of Langley 1st Duke York (age 58) appointed William Scrope 1st Earl Wiltshire (age 49), Henry Green (age 52) and John Bussy to protect Kent against invasion by Henry Bolingbroke Earl of Derby (age 32).

After 07 Jul 1399 Henry Bolingbroke Earl of Derby (age 32) landed at Ravenspur [Map] with Thomas Rempston.

William Ros 6th Baron Ros Helmsley (age 29) joined Henry Bolingbroke Earl of Derby (age 32) with a large retinue.