page_title: United Kingdom
section_title: Kingdom of Great Britain
hierarchical_section_title: United Kingdom / History / Kingdom of Great Britain
caption_attribution_description: English: Scottish Exemplification (official copy) of the Treaty of Union of 1707
context_page_description: The United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom or Britain, is a sovereign country located off the north­western coast of the European mainland. The United Kingdom includes the island of Great Britain, the north­eastern part of the island of Ireland, and many smaller islands. Northern Ireland shares a land border with the Republic of Ireland. Otherwise, the United Kingdom is surrounded by the Atlantic Ocean, with the North Sea to the east, the English Channel to the south and the Celtic Sea to the southwest, giving it the 12th-longest coastline in the world. The Irish Sea separates Great Britain and Ireland. The total area of the United Kingdom is 94,000 square miles.
  The United Kingdom is a unitary parliamentary democracy and constitutional monarchy. The monarch is Queen Elizabeth II, who has reigned since 1952, making her the world's longest-serving current head of state. The United Kingdom's capital is London, a global city and financial centre with an urban area population of 10.3 million.
  The United Kingdom consists of four countries: England, Scotland, Wales and Northern Ireland.
context_section_description: On 1 May 1707, the Kingdom of Great Britain was formed, the result of Acts of Union being passed by the parliaments of England and Scotland to ratify the 1706 Treaty of Union and so unite the two kingdoms.
  In the 18th century, cabinet government developed under Robert Walpole, in practice the first prime minister (1721–1742). A series of Jacobite Uprisings sought to remove the Protestant House of Hanover from the British throne and restore the Catholic House of Stuart. The Jacobites were finally defeated at the Battle of Culloden in 1746, after which the Scottish Highlanders were brutally suppressed. The British colonies in North America that broke away from Britain in the American War of Independence became the United States of America, recognised by Britain in 1783. British imperial ambition turned towards Asia, particularly to India.
  During the 18th century, Britain was involved in the Atlantic slave trade. British ships transported an estimated two million slaves from Africa to the West Indies. Parliament banned the trade in 1807, banned slavery in the British Empire in 1833, and Britain took a leading role in the movement to abolish slavery worldwide through the blockade of Africa and pressing other nations to end their trade with a series of treaties. The world's oldest international human rights organisation, Anti-Slavery International, was formed in London in 1839.
caption: The Treaty of Union led to a single united kingdom encompassing all of Great Britain.
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