Republic of Ireland–United Kingdom border
Originally intended as an internal boundary within the United Kingdom of Great Britain and Ireland, the border was created in 1921 under the United Kingdom Parliament's Government of Ireland Act 1920. Prior to this, a separatist Irish parliament had been established in Dublin, which did not recognise the Government of Ireland Act, and was actively engaged in the Irish War of Independence. The Act was intended to deliver Home Rule in Ireland, with separate parliaments for Southern Ireland (which included three of the nine counties of Ulster) and Northern Ireland. Six of the thirty-two counties of Ireland were assigned to Northern Ireland, and the rest of Ireland comprising 26 counties to Southern Ireland.
Outline of Northern Ireland
Northern Ireland was for many years the site of a violent and bitter ethno-political conflict — the Troubles — which was caused by divisions between Irish nationalists, who are predominantly Roman Catholic, and unionists, who are predominantly Protestant. Unionists want Northern Ireland to remain part of the United Kingdom, while nationalists wish it to be politically reunited with the rest of Ireland. Since the signing of the "Good Friday Agreement" in 1998, most of the paramilitary groups involved in the Troubles have ceased their armed campaigns.Geography of Northern Ireland
Administrative divisions of Northern IrelandDemographics of Northern Ireland