The siege of Clonmel took place between 27 April and 18 May 1650, during the Cromwellian conquest of Ireland when the town of Clonmel in County Tipperary was besieged by Oliver Cromwell's New Model Army. Cromwell's 8,000 men eventually took the town from its 2,000 Irish defenders, but not before they suffered losses of around 2,000 soldiers. Most were killed after being caught in a trap by Hugh Dubh ("Black Hugh") O'Neill on 17 May 1650.