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.
Northern Ireland Executive
The original Northern Ireland Executive was established on 1 January 1974, following the Sunningdale Agreement. It comprised a voluntary coalition between the Ulster Unionist Party, Social Democratic and Labour Party and Alliance Party of Northern Ireland, with the UUP's Brian Faulkner in the position of Chief Executive. It was short-lived, collapsing on 28 May 1974 due to the Ulster Workers' Council strike, and the Troubles continued in the absence of a political settlement.