What created the United Kingdom of Great Britain and Ireland

The United Kingdom of Great Britain and Ireland was a sovereign state established by the Acts of Union 1800, which merged the kingdoms of Great Britain and Ireland. The United Kingdom, having financed the European coalition that defeated France during the Napoleonic Wars, developed a large Royal Navy that enabled the British Empire to become the foremost world power for the next century.

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Explanation:

The United Kingdom, made up of England, Scotland, Wales and Northern Ireland, is an island nation in northwestern Europe. England - birthplace of Shakespeare and The Beatles - is home to the capital, London, a globally influential center of finance and culture. England is also site of Neolithic Stonehenge, Bath's Roman spa and centuries-old universities at Oxford and Cambridge.