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.
History of rail transport in Ireland
In 1875, the D&D and the D&BJct merged to form the "Northern Railway of Ireland" and thirteen months later the Great Northern Railway (Ireland) (GNR(I)) was formed when the Ulster Railway and the INWR joined this concern. Other minor railways were subsequently taken over. At its height, in the thirty or so years prior to World War I, the GNR(I) covered a large area of Ireland between Dublin, Belfast, Derry and Bundoran. By the end of World War II the company was in dire straits. It struggled on until 1953 when it was nationalised by the two Governments, becoming the Great Northern Railway Board.