Question: Which  province in the north of the island of Ireland did Queen Medb of Connacht  made his invasion

full_context: Document 1: Christianity in Ireland: Christianity is and has been the largest religion in Ireland. Most Christian churches are organized on an all-Ireland basis, including both the Republic of Ireland and Northern Ireland. In the Republic of Ireland, 84.2% of the population adheres to the Catholic Church. In Northern Ireland, the various branches of Protestantism collectively form a majority of the population but the single largest church is the Catholic Church which accounts for some 40.8% of the population.
Document 2: Fergus mac Róich: Fergus mac Róich (son of "Ró-ech" or "great horse"; also mac Róig, mac Rossa) is a character of the Ulster Cycle of Irish mythology. Formerly the king of Ulster, he is tricked out of the kingship and betrayed by Conchobar mac Nessa, and becomes the ally and lover of Conchobar's enemy queen Medb of Connacht, and joins her expedition against Ulster in the "Táin Bó Cúailnge". The name "Fergus" (later Irish "Fearghus") means "man-strength" or "virility", and Fergus is described as being of enormous size and sexual potency. This leads him into many a precarious situation as in the story of the Táin Bó Flidhais.
Document 3: Ulster: Ulster ( ; Irish: "Ulaidh" ] or "Cúige Uladh" ] , Ulster Scots: "Ulstèr" or "Ulster") is a province in the north of the island of Ireland. It is made up of nine counties, six of which are in Northern Ireland (a part of the United Kingdom) and three of which are in the Republic of Ireland. It is the second largest and second most populous of Ireland's four provinces, with Belfast being its biggest city. Unlike the other provinces, Ulster has a high percentage of Protestants. Those of Catholic background make up about 51% of its population while those of Ulster Protestant background make up about 43%. English is the main language and Ulster English the main dialect. A minority also speak Irish, and there is a Gaeltacht (Irish-speaking region) in the west of Ulster. Lough Neagh, in the east, is the largest lake in the British Isles, while Lough Erne in the west is one of its largest lake networks. The main mountain ranges are the Mournes, Sperrins, Croaghgorms and Derryveagh Mountains.
Document 4: Ulster Scots people: The Ulster Scots (Ulster-Scots: "Ulstèr-Scotch"), also called Ulster-Scots people (Ulster-Scots: "Ulstèr-Scotch fowk") or, outside the British Isles, Scots-Irish (Ulster-Scots: "Scotch-Airisch"), are an ethnic group in Ireland, found mostly in the Ulster region and to a lesser extent in the rest of Ireland. Their ancestors were mostly Protestant Lowland Scottish migrants, the largest numbers coming from Galloway, Lanarkshire, Renfrewshire, Ayrshire and the Scottish Borders, with others coming from further north in the Scottish Lowlands and, to a much lesser extent, from the Highlands.
Document 5: Belfast: Belfast ( or ; from Irish: "Béal Feirste" , meaning "rivermouth of the sandbanks" ) is the capital and largest city of Northern Ireland, and the second largest on the island of Ireland. On the River Lagan, it had a population of 333,871 in 2015. Belfast was granted city status in 1888.
Document 6: Sírna Sáeglach: Sírna Sáeglach ("the long-lived"), son of Dian mac Demal, son of Demal mac Rothechtaid, son of Rothechtaid mac Main, was, according to medieval Irish legend and historical tradition, a High King of Ireland. He separated the province of Ulster from the authority of the High King, and is said to have made war against the Ulaid, who had killed his great grandfather, for a hundred years according to the "Lebor Gabála Érenn", 150 years according to the "Annals of the Four Masters", but Geoffrey Keating, citing an ancient poem, gives him only twenty-one years. According to one version of the "Lebor Gabála", the Ulaid united with the Fomorians and gave him battle at Móin Trógaide in County Meath, but a plague fell on them and the leaders of both sides died. According to another version, agreed by Keating and the Four Masters, Sírna was killed by Rothechtaid Rotha at Alind. The "Lebor Gabála" synchronises the start of his reign with the reign of Deioces of the Medes (694–665 BC), and his death with his successor Phraortes (665–633 BC). The chronology of Keating's "Foras Feasa ar Éirinn" dates his reign to 814–794 BC, that of the "Annals of the Four Masters" to 1181–1031 BC.
Document 7: Languages of Northern Ireland: English is the most spoken language in Northern Ireland. There are also two recognised regional languages in Northern Ireland: the Irish language ("see Irish language in Northern Ireland") and the local variety of Scots known as Ulster Scots. Northern Ireland Sign Language and Irish Sign Language have been recognised since 29 March 2004.
Document 8: Táin Bó Cúailnge: Táin Bó Cúailnge (] ; "the driving-off of cows of Cooley", commonly known as The Cattle Raid of Cooley or The Táin) is a legendary tale from early Irish literature, often considered an epic, although it is written primarily in prose rather than verse. It tells of a war against Ulster by the Connacht queen Medb and her husband Ailill, who intend to steal the stud bull Donn Cuailnge, opposed only by the teenage Ulster hero Cú Chulainn.
Document 9: Lough Neagh: Lough Neagh (pronounced , ) is a large freshwater lake in Northern Ireland. It is the largest lake by area in the British Isles, with a surface area of 392 km2 . It supplies 40% of Northern Ireland's water. Its main inflows are the Upper River Bann and River Blackwater, and its main outflow is the Lower River Bann. Its name comes from Irish: "Loch nEachach" , meaning "Eachaidh's lake" (] ). The lough is owned by the Earl of Shaftesbury.
Document 10: Ulster Protestants: Ulster Protestants (Irish: "Protastúnaigh Uladh" ) are an ethnoreligious group in the Irish province of Ulster, where they make up about 43% of the population. Many Ulster Protestants are descendants of the Protestant settlers involved in the early 17th century Ulster Plantation, which introduced the first significant numbers of Protestants into the west and centre of the province. These settlers were mostly Lowland Scottish and Northern English people and predominantly from Galloway, the Scottish Borders and Northumberland.
Document 11: Dáire mac Fiachna: Queen Medb of Connacht had discovered that her husband, Ailill, was richer than her to the tune of one extremely fertile stud bull, and resolved to even the account by possessing Dáire's great bull. She sent messengers to Dáire with an extremely generous offer of land and treasure, and if necessary sexual favours, if he would loan the bull to her for a year. Dáire agreed. However the messengers got drunk, and one boasted that if he had not agreed Medb would have taken the bull by force. When Dáire heard that he backed out of the deal, and Medb did indeed take the bull by force.
Document 12: Medb: Medb (pronounced ] )—later spelled Meadhbh (] ) and Méabh (] )—is queen of Connacht in the Ulster Cycle of Irish mythology. Her husband in the core stories of the cycle is Ailill mac Máta, although she had several husbands before him who were also kings of Connacht. She rules from Cruachan (now Rathcroghan, County Roscommon). She is the enemy (and former wife) of Conchobar mac Nessa, king of Ulster, and is best known for starting the "Táin Bó Cúailnge" ("The Cattle Raid of Cooley") to steal Ulster's prize stud bull. Medb is strong-willed, ambitious, cunning and promiscuous, and is an archetypal warrior queen. She is believed to be a manifestation of the sovereignty goddess. Medb of Connacht is probably identical with Medb Lethderg, the sovereignty goddess of Tara, and may also be linked with the Morrígan.
Document 13: Religion in Northern Ireland: Christianity is the largest religion in Northern Ireland. According to a 2007 Tearfund survey, Northern Ireland was the most religious part of the UK, with 45% regularly attending church.
Document 14: Louis le Brocquy Táin illustrations: In 1967 Louis le Brocquy was commissioned by the publisher Liam Miller to illustrate Thomas Kinsella's inspired version of the Táin Bó Cúailnge, the dramatic record of Ireland's proto-historic past. Ailbhe Ní Bhriain remarks: 'The Táin Bó Cuailnge - táin, meaning the gathering of people for a cattle raid - is a prose epic with verse passages and forms the centrepiece of the cycle of Ulster heroic stories. It tells of the exploits of King Conchobar and his chief warrior Cúchulainn ("The Hound of Ulster") and of the invasion of Ulster by Queen Medb of Connacht in an attempt to capture the Brown Bull of Cuailgne. Dating as far back as the 12th century in manuscript form, this legend has been treated both academically by scholars and linguists and romantically by such Revival writers as Yeats and Lady Gregory. The Dolmen Edition of the saga was to give, in Kinsella's words, the first "living version of the story", a version true to its blunt and brutal Gaelic character.' Louis le Brocquy paints several hundred calligraphic brush drawings over a period of six months retaining 133 illustrations. The artist will note: 'Any graphic accompaniment to a story which owes its existence to the memory and concern of a people over some twelve hundred years, should decently be as impersonal as possible. The illustrations of early Celtic manuscripts express not personality but temperament. They provide not graphic comment on the text but an extension of it. Their means are not available to us today - either temperamentally or technically - but certain lessons may be learned from them relevant to the present work. In particular they suggest that graphic images, if any, should grow spontaneously and even physically from the matter of the printed text. If these images - these marks in printer's ink - form an extension to Thomas Kinsella's Táin, they are a humble one. It is as shadows thrown by the text that they derive their substance.'
Document 15: Béroul: Béroul was a Norman poet of the 12th century. He wrote "Tristan", a Norman language version of the legend of Tristan and Iseult of which a certain number of fragments (approximately 3000 verses) have been preserved; it is the earliest representation of the so-called "vulgar" version of the legend (the "courtly" version being represented by fragments from Thomas of Britain's poem). Eilhart von Oberge wrote a treatment of this version in German, and many of Béroul's episodes that do not appear in Thomas reappear in the Prose "Tristan". Beroul's poem survives in a single manuscript now in the Bibliothèque Nationale in Paris. This copy is poorly written and there is a suggestion that part of the poem was written by a different scribe from the rest. The actual content of the poem also differs from the modern conception of what a narrative poem should be; the plot is disjointed and lacking in a flow of cause and effect, and the characters are poorly defined. Nevertheless, Fedrick proposes that this was common of literature in Beroul's time.
ground_truth: Ulster