Siege of Limerick commences on August 9, 1690 when William of Orange and his army of 25,000 men reach Limerick and occupy Ireton’s fort and Cromwell’s fort outside the city. His siege cannons are still making their way from Dublin with a light escort so all he has available is his field artillery. The siege train is intercepted by Patrick Sarsfield’s cavalry at Ballyneety in County Limerick and destroyed, along with the Williamites‘ siege guns and ammunition. This forces William to wait another ten days before he can start bombarding Limerick in earnest while another siege train is brought up from Waterford.
By this time it is late August. Winter is approaching and William wants to finish the war in Ireland so he can return to the Netherlands and proceed with the main business of the War of the Grand Alliance against the French. For this reason, he decides on an all out assault on Limerick.
His siege guns blast a breach in the walls of the “Irish town” section of the city and William launches his assault on August 27. The breach is stormed by Danish grenadiers but the Jacobite’s French officer Boisseleau has built an earthwork or coupure inside the walls and has erected barricades in the streets, impeding the attackers. The Danish grenadiers, and the eight regiments who follow them into the breach, suffer terribly from musketry and cannon fire at point blank range. Jacobite soldiers without arms and the civilian population, including women, line the walls and throw stones and bottles at the attackers. A regiment of Jacobite dragoons also make a sortie and attack the Williamites in the breach from the outside. After three and a half hours of fighting, William finally calls off the assault.
William’s men suffer about 3,000 casualties, including many of their best Dutch, Danish, German, and Huguenot troops. The Jacobites lose only 400 men in the battle. Due to the worsening weather, William calls off the siege and puts his troops into winter quarters, where another 2,000 of them die of disease. William himself leaves Ireland shortly afterwards, returning to London. He subsequently leaves London to take command of Allied forces fighting in Flanders, and leaves Godert de Ginkell to command in Ireland. The following year Ginkell wins a significant victory at the Battle of Aughrim.
Limerick is to remain a Jacobite stronghold until it surrenders after another Williamite siege the following year. Following the loss of this last major stronghold, Patrick Sarsfield leads the army into exile in the Flight of the Wild Geese to the Continent, where they continue to serve the cause of James II and his successors.