Monarchy of Ireland and Ireland in a personal union. The Union of the Crowns in 1603 expanded the personal union to include Scotland. The personal union between England and Scotland became a political union with the enactments of the Acts of Union 1707, which created the Kingdom of Great Britain. The crowns of Great Britain and Ireland remained in personal union until it was ended by the Acts of Union 1800, which united Ireland and Great Britain into the United Kingdom of Great Britain and Ireland from January 1801 until December 1922. After that date, most of Ireland left the United Kingdom to
Unionism in England in various stages of the Union Flag, which forms the flag of the United Kingdom. The larger part of Ireland left the United Kingdom in 1922, however the separation of Ireland which originally occurred under the Government of Ireland Act 1920 was upheld by the British Government and the Unionist-controlled devolved Parliament of Northern Ireland, and chose to remain within the state today, which is now officially termed the United Kingdom of Great Britain and Northern Ireland. The 300th anniversary of the union of Scotland and England was marked in 2007. In England, support for the Union has traditionally been