was composed of the
, and other
ruled or administered by the
and its predecessor states. It began with the
between the late 16th and early 18th centuries.
At its height it was the
largest empire in history and, for over a century, was the foremost global power. By 1913 the British Empire held sway over 412 million people, 23 per cent of the world population at the time, and by 1920 it covered 35,500,000 km2 (13,700,000 sq mi), 24 percent of the Earth's total land area. As a result, its
cultural legacy is widespread. At the peak of its power, it was described as "
the empire on which the sun never sets", as the sun was always shining on at least one of its territories.
Age of Discovery in the 15th and 16th centuries,
Spain pioneered European exploration of the globe, and in the process established large overseas empires. Envious of the great wealth these empires generated, England,
France, and the
Netherlands began to establish colonies and trade networks of their own in the Americas and Asia. A series of wars in the 17th and 18th centuries with the Netherlands and France left England (
Britain, following the
1707 Act of Union with Scotland) the dominant
colonial power in North America. Britain became the dominant power in the
Indian subcontinent after the
East India Company's conquest of
Mughal Bengal at the
Battle of Plassey in 1757.
American War of Independence resulted in Britain losing some of its oldest and most populous colonies in North America by 1783. British attention then turned towards Asia, Africa, and the Pacific. After the defeat of France in the
Napoleonic Wars (1803–1815), Britain emerged as the principal naval and imperial power of the 19th century and expanded its imperial holdings. The period of relative peace (1815–1914) during which the British Empire became the global
hegemon was later described as "
Pax Britannica" ("British Peace"). Alongside the formal control that Britain exerted over its colonies, its dominance of much of world trade meant that it effectively
controlled the economies of many regions, such as Asia and Latin America. Increasing degrees of autonomy were granted to its white
settler colonies, some of which were reclassified as dominions.
By the start of the 20th century,
had begun to challenge Britain's economic lead. Military and economic tensions between Britain and Germany were major causes of the
First World War
, during which Britain relied heavily on its empire. The conflict placed enormous strain on its military, financial, and manpower resources. Although the empire achieved its largest territorial extent immediately after World War I, Britain was no longer the world's pre-eminent industrial or military power. In the
Second World War
, Britain's colonies in East Asia and Southeast Asia were occupied by the
Empire of Japan
. Despite the final victory of Britain and its allies, the damage to British prestige helped accelerate the decline of the empire. India, Britain's most valuable and populous possession, achieved
as part of a larger
movement, in which Britain granted independence to most territories of the empire. The
confirmed Britain's decline as a global power, and the
transfer of Hong Kong to China
in 1997 marked for many the end of the British Empire. Fourteen
remain under British sovereignty. After independence, many former British colonies joined the
Commonwealth of Nations
, a free association of independent states. Sixteen of these, including the United Kingdom, retain a
, currently Queen