Bagenal Harvey, a United Irishmen commander who had recently been released from captivity following the capture of
Wexford by a rebel force, attempted to negotiate the surrender of New Ross. However, the emissary he sent, Matt Furlong, was killed by government forces while approaching an outpost outside the town bearing a flag of truce. His death provoked a furious charge by an advance guard of 500 rebels led by
John Kelly, who had instructions to seize the Three Bullet Gate and wait for reinforcements before pushing into the rest of the town. To aid their attack, the rebels first drove a herd of cattle through the gate. Another rebel column attacked the Priory Gate but the third pulled back from the Market Gate intimidated by the strong defences. Seizing the opportunity the garrison sent a force of
cavalry out the Market Gate to attack and scatter the remaining two hostile columns from the flanks. However the rebel rump had not yet deployed and upon spotting this manoeuvre, rallied the front ranks who stood and broke the cavalry charge with massed pikes. The encouraged rebel army then swept past the Crown outposts and seized the Three Bullet Gate causing the garrison and populace to flee in panic. Without pausing for reinforcement, the rebels broke into the town attacking simultaneously down the steeply sloping streets but met with strong resistance from well-prepared second lines of defence of the well-armed soldiers. Despite horrific casualties the rebels managed to seize two-thirds of the town by using the cover of smoke from burning buildings and forced the near withdrawal of all Crown forces from the town. However, the rebels' limited supplies of gunpowder and ammunition forced them to rely on the
pike and blunted their offensive. The military managed to hold on and following the arrival of reinforcements, launched a counterattack before noon which finally drove the exhausted rebels from the town. During and after the battle, government forces systematically killed captured and wounded rebels. As noted by American historian Daniel Gahan, both rebels and government troops had perpetrated such atrocities in the past, though sixty-nine rebels were burned alive when a rebel-held
aid station, a large house on Mary Street, was set on fire by government troops. James Alexander, an officer in the garrison, wrote in a later account of the battle that "the screams of the terrified doomed men could be clearly heard, despite the noise of the battle, over much of the town." Reports of such atrocities brought by escaping rebels are believed to have influenced the murder of over 100
loyalists in the
Scullabogue Barn massacre. ==Aftermath==