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
Acts of Union 1707 not mean James abandoned the idea; 17th-century religion and politics were closely linked and he viewed a unified Church of Scotland and England as the first step towards a centralised, Unionist state. The problem was that the two churches were very different in both structure and doctrine; Scottish bishops presided over Presbyterian structures but were doctrinal Calvinists who viewed many Church of England practices as little better than Catholicism. The religious policies followed by James and his son Charles I were intended as precursors to political union; resistance to this concept led to the 1638 National Covenant in Scotland and