At the start of the war, Irish Jacobites controlled most of Ireland for James II, with the exception of the Williamite strongholds at Derry and at Enniskillen in Ulster. The Jacobites besieged Derry from December 1688 to July 1689, ending when a Williamite army from Britain relieved the city. The Williamites based in Enniskillen defeated another Jacobite army at the battle of Newtownbutler on 28 July 1689. Thereafter, Ulster remained firmly under Williamite control and William's forces completed their conquest of the rest of Ireland in the next two years. The war provided Protestant loyalists with the iconic victories of the Siege of Derry, the Battle of the Boyne (1 July 1690) and the Battle of Aughrim (12 July 1691), all of which the Orange Order commemorate each year.