The 'Break'
On March 14, he crossed the river Bann and attacked a 3,000 strong Williamite force under Lord Mount Alexander at Dromore. Alexander's cavalry fell back in disorder following a charge by the Jacobite dragoons. Seeing this, Hamilton ordered a general advance of his infantry and the Williamite foot fled towards Dromore itself. They were overtaken in the village by the Jacobite cavalry and slaughtered, roughly 400 being killed and the rest fleeing for their lives.
In the aftermath of the engagement, Alexander rode to Donaghadee and from there took ship to England. Hamilton's men looted and sacked Dromore. The following day, he took Hillsborough and Williamite council dissolved. Thousands of Protestants, fearing Jacobite and Catholic retribution, fled either to Coleraine in the west of Ulster, or to the ports and from there to England or Scotland.
Read more about this topic: Break Of Dromore