 Purcell's Dragoon Regiment rode down to County Clare to rendezvous with the cavalry.French Major-General Boisseleau commanded the defence of Limerick, and the Williamites commenced their attack in August, and soon occupied both Ireton's Fort and Cromwell's Fort.Shortly thereafter, on 11 August 1690, Sarsfield crossed the Shannon near Killaloe with the pick of the Irish cavalry and dragoons including Purcell's Regiment.