History of the formation of the United Kingdom Kingdom of England (which included Wales and controlled Ireland) and the Kingdom of Scotland. The once independent Principality of Wales fell under the control of English monarchs from the Statute of Rhuddlan in 1284. The Union of Crowns in 1603, the accidental consequence of a royal marriage one hundred years earlier, united the kingdoms in a personal union, though full political union in the form of the Kingdom of Great Britain required a Treaty of Union in 1706 and Acts of Union in 1707 (to ratify the Treaty). The Act of Union 1800 united the Kingdom of Great Britain with
Acts of Union 1707 between the Church of England and the kirk. While it referred repeatedly to 'union' between England, Scotland, and Ireland, it did not explicitly commit to political union which had little support even among their English supporters. Even religious union was fiercely opposed by the Episcopalian majority in the Church of England and Independents like Oliver Cromwell. The Scots and English Presbyterians came to see the Independents who dominated the New Model Army as a bigger threat than the Royalists and when Charles I surrendered in 1646, they agreed to restore him to the English throne. Both Royalists and Covenanters agreed