From 6 to 11 July 1997 there were mass protests, fierce riots and gun battles in Irish nationalist districts of Northern Ireland. Irish nationalists/republicans, in some cases supported by the Provisional Irish Republican Army (IRA), attacked the Royal Ulster Constabulary (RUC) and British Army. The protests and violence were sparked by the decision to allow the Orange Order (a Protestant, unionist organization) to march through a Catholic/nationalist neighbourhood of Portadown. Irish nationalists were outraged by the decision and by the RUC's aggressive treatment of those protesting against the march. There had been a bitter dispute over the march for many years.