The
United Kingdom (UK) is arguably Europe's most influential country. In simple terms, it's the union of the individual countries of
England, Scotland and
Wales, collectively called
Great Britain (Europe's largest island) and the northeastern corner of Ireland - the constitutionally distinct region of
Northern Ireland.

The United Kingdom is a constitutional monarchy. Its reigning monarch, Queen Elizabeth II, is also the Queen and Head of State of (15) other Commonwealth realms, including Australia, Canada, Jamaica and New Zealand.
With deference to the Roman Empire, and 15th and early 16th century
Spain, the British Empire was the world's first superpower, with colonies and dependencies stretching around the globe.
It was the significant factor and strongest ingredient in the development of many English speaking countries, including the United States - its closest ally.
Throughout the 19th Century,
Great Britain was the world's dominant industrial and maritime power. It played a huge role in the development of our modern democracies, and in the advancements of literature, manufacturing, science and the performing arts.

Despite the (
global) decline of the British Empire, the United Kingdom remains a consequential force; it's the fifth largest economy in the world, second largest in
Europe, and a respected (
major) military power.
The genesis of the United Kingdom began in early
England. It took centuries of invasions and wars, heroes and villains, kings and queens, and swallowed pride by all concerned before its many parts united as one.
For historical details on each of the countries, and how it all came together, follow the links below: