Why is Northern Ireland part of the United Kingdom?

They were caused by a motion to limit the number of days Britain's Union Jack flag flew on Belfast City Hall. Severe rioting lasted for two months and seemed to centre on the tricky question of why Northern Ireland, composed of six north-eastern counties in Ireland, is part of the United Kingdom. read more

Ireland became part of the United Kingdom in 1801. But Ireland’s sectarian divisions, which had opened up during religious wars in the 17th century between Protestants and Catholics, were exacerbated by economic problems in the 19th century. read more

Eventually, the Irish Republic and the United Kingdom of Great Britain and Ireland signed the Anglo-Irish treaty, which made all of Ireland into a British Dominion called the Irish Free State, with an opt out for Northern Ireland if they wanted to rejoin the UK (which they took). read more

The United Kingdom of Great Britain and Ireland was a sovereign country in western Europe, the predecessor to the modern United Kingdom of Great Britain and Northern Ireland. It was established on 1 January 1801 by the Acts of Union 1800, which merged the parliaments of Great Britain and Ireland and combined the Crown of Ireland into the British Crown. read more