[3] In a last-ditch attempt to relieve the strategic port of Chester, Royalist cavalry commander Sir William Vaughan ordered the mustering of around 2,000 men, drawn from garrisons across Shropshire and north-east Wales, at Denbigh Green.Following a failed attempt to link up with Royalists in Scotland, and with his supporters increasingly confined to a series of small garrisons in the West of England and Wales, Charles I pinned his hopes on reinforcement from Ireland.[6] His force eventually included remnants of at least ten regiments, though the collapse in Royalist supply lines meant they were poorly armed: it was reported that of the cavalry "scarce a tenth man hath a pistol".[9] By 31 October, Vaughan was encamped on Denbigh Green, an open four-mile tract of commonland outside the town, where he received news Mytton had left Ruthin.[1] Most forces ordered to the rendezvous from the North Wales garrisons had yet to arrive and diarist Richard Symonds, a volunteer with Vaughan, counted the Royalist cavalry at just 700, although this may have been exclusive of several hundred lightly armed Irish.Some dragoons of the High Ercall garrison, supported by troopers of Prince Maurice's Lifeguard, countercharged and briefly checked Mytton's advance, but following a third charge the Royalists broke.
St Marcella's Church was where the initial fighting took place.