アイルランド・カトリック同盟
During the 17th century representatives from Connacht played leading roles in Confederate Ireland and during the Williamite War in Ireland. Its main town, Galway, endured several sieges (see Sieges of Galway), while warfare, plague, famine and sectarian massacres killed about a third of the population by 1655. One of the last battles fought in pre-20th century Ireland occurred in Connacht, the Battle of Aughrim on 12 July 1691.