the late 20th century, County Donegal was adversely affected by The Troubles in Northern Ireland. The county suffered several bombings and assassinations. In June 1987, Constable Samuel McClean, a Donegal man who was a serving member of the Royal Ulster Constabulary (RUC), was shot dead by the Provisional Irish Republican Army (Provisional IRA) at his family home near Drumkeen. In May 1991, the prominent Sinn Féin politician Councillor Eddie Fullerton was assassinated by the Provisional IRA's opponent, the Ulster Defence Association (UDA), at his home in Buncrana. This added further to the economic and social difficulties of the county. However, the greater economic and administrative integration with Northern Ireland, following the Good Friday Agreement of April 1998, has been of benefit to the county. It has been labelled the 'forgotten county' by its own politicians, owing to the perception that it is ignored by the government, even in times of crisis. Geography and subdivisions Located in the northwest corner of Ireland, Donegal is the island's northernmost county. In terms of size and area, it is the largest county in Ulster and the fourth-largest county in all of Ireland. Uniquely, County Donegal shares a small border with only one other county in the Republic of Ireland – County Leitrim. The vast majority of its land border (93%) is shared with three counties of Northern Ireland: County Tyrone, County Londonderry and County Fermanagh. This geographic isolation from the rest of the Republic has led to Donegal people maintaining a distinct cultural identity and has been used to market the county with the slogan "Up here it's different". While Lifford is the county town, Letterkenny is by far the largest town in the county with a population of just under 20,000. Letterkenny and the nearby city of Derry form the main economic axis in the northwest of Ireland. Indeed, what became the City of Derry was officially part of County Donegal up until 1610. It is part of the Northern and Western Region (a NUTS 2 European statistical Region), within which it is part of the Border strategic planning area. Baronies and townlands There are eight historic baronies in the county. While baronies continue to be officially defined units, they ceased to have any administrative function following the Local Government Act 1898, and any changes to county boundaries after the mid-19th century are not reflected in their extent. The last boundary change of