Walter Devereux (1387–1419)
Walter Devereux assumed a position in the retinue of Henry IV following the death of his father on 25 July 1402 at the Battle of Pilleth. On 13 December 1402 Sir Edmund Mortimer declared his rebellion against Henry IV, but Devereux stayed loyal to the king. He was probably present at the Battle of Shrewsbury on 21 July 1403, and subsequently was knighted. Sir Walter Devereux was placed on a Commission of array for Herefordshire on 8 September 1403 to raise troops for the defense against the king’s enemies who have lately invaded the realm. It is probable that Devereux was present when Henry IV faced off with a combined Welsh and French force in South Wales during the summer of 1405, but no major battle occurred and the English force had dispersed by October of that year. Devereux remained an important supporter of the efforts to suppress the rebellion in Wales as Prince Henry assumed responsibility for the fight. Walter Devereux would be among 14 men below the rank of baron who would be retained for life by Prince Henry (the future Henry V).
Walter Devereux (died 1641)
When Essex set out with the English Expeditionary Force to the Low Countries in August 1624, Walter accompanied him as a captain of the foot in Essex's regiment. He remained with Essex through the Winter at the Siege of Breda and shared the hardships and hand-to-hand combat occurring at the close of this action. In May 1625 he opted to remain in the Low Countries due to disease in London, and requested payment for this extended service from the Dutch government in May 1626. Walter Devereux returned to England in July 1625 for Parliamentary elections, and may have returned to the Low Countries with Essex who finally returned to England in November 1626 for good after failing to be given an appropriate command with the troops being sent to join the King of Denmark under General Morgan.