The Ulster Cycle (Irish: an Rúraíocht), formerly known as the Red Branch Cycle, one of the four great cycles of Irish mythology, is a body of medieval Irish heroic legends and sagas of the traditional heroes of the Ulaid in what is now eastern Ulster and northern Leinster, particularly counties Armagh, Down and Louth, and taking place around or before the 1st century AD.
The Ulster Cycle stories are set in and around the reign of King Conchobar mac Nessa, who rules the Ulaid from Emain Macha (now Navan Fort near Armagh). The most prominent hero of the cycle is Conchobar's nephew, Cú Chulainn. The Ulaid are most often in conflict with the Connachta, led by their queen, Medb, her husband, Ailill, and their ally Fergus mac Róich, a former king of the Ulaid in exile. The longest and most important story of the cycle is the Táin Bó Cúailnge or "Cattle Raid of Cooley", in which Medb raises an enormous army to invade the Cooley peninsula and steal the Ulaid's prize bull, Donn Cúailnge, opposed only by the seventeen-year-old Cú Chulainn. In the Mayo Táin, the Táin Bó Flidhais it is a white cow known as the 'Maol' that is the object of desire, for she can give enough milk at one milking to feed an army. Perhaps the best known story is the tragedy of Deirdre, source of plays by W. B. Yeats and J. M. Synge. Other stories tell of the births, courtships and deaths of the characters and of the conflicts between them.
Ulster (/ˈʌlstər/; Irish: Ulaidh pronounced [ˈul̪ˠəi] or Cúige Uladh pronounced [ˈkuːɟə ˈul̪ˠə], Ulster Scots: Ulstèr or Ulster) is a province in the north of the island of Ireland. In ancient Ireland, it was one of the fifths (Irish: cúige) ruled by a rí ruirech, or "king of over-kings".
The definition of the province was fluid from early to medieval times. It took a definitive shape in the reign of King James I of England when all the counties of Ireland were eventually shired. This process of evolving conquest had been under way since the Norman invasion of Ireland, particularly as advanced by the Cambro-Norman magnates Hugh de Lacy and John de Courcy. Ulster was a central topic role in the parliamentary debates that eventually resulted in the Government of Ireland Act 1920. Under the terms of the Act, Ireland was divided into two territories, Southern Ireland and Northern Ireland, with the border passing through the province. "Southern Ireland" was to be all of Ireland except for "the parliamentary counties of Antrim, Armagh, Down, Fermanagh, Londonderry and Tyrone, and the parliamentary boroughs of Belfast and Londonderry [the city of Derry]" which were to constitute "Northern Ireland". The area of Northern Ireland was seen as the maximum area within which Ulster Protestants/unionists could be expected to have a safe majority, despite counties Fermanagh and Tyrone having slight Roman Catholic/Irish nationalist majorities. While these six counties and two parliamentary boroughs were all in the province of Ulster, three other counties of the province – Cavan, Donegal and Monaghan – were assigned to the Irish Free State.
Northern Ireland (Irish: Tuaisceart Éireann [ˈt̪ˠuəʃcəɾˠt̪ˠ ˈeːɾʲən̪ˠ]; Ulster Scots: Norlin Airlann) is a constituent unit of the United Kingdom of Great Britain and Northern Ireland in the northeast of the island of Ireland. It is variously described as a country, province, region, or "part" of the United Kingdom, amongst other terms. Northern Ireland shares a border to the south and west with the Republic of Ireland. In 2011, its population was 1,810,863, constituting about 30% of the island's total population and about 3% of the UK's population. Established by the Northern Ireland Act 1998 as part of the Good Friday Agreement, the Northern Ireland Assembly holds responsibility for a range of devolved policy matters, while other areas are reserved for the British government. Northern Ireland co-operates with the Republic of Ireland in some areas, and the Agreement granted the Republic the ability to "put forward views and proposals" with "determined efforts to resolve disagreements between the two governments".