 As a result their position in the North would soon crumble and Frederick Henry, encouraged by the success, would start a series of other sieges, assisted by his cousin Van den Bergh, who changed sides after being accused of treason.Many of the English soldiers who fought during the siege would become prominent during the English Civil Wars.These were Thomas Fairfax, Jacob Astley, Philip Skippon, Thomas Glemham, George Monck as well as Henry Hexham, the historian of the Dutch wars.