From trading posts to territorial dominance
Britain's empire began as merchant trading posts in the 17th century: small coastal settlements in India, the Caribbean, and Africa focused on commerce. By 1800, Britain controlled substantial territory on four continents. The 1922 peak came after World War I, when Britain took German colonies and Ottoman territories, covering roughly 25% of Earth's land and population. The phrase 'the empire on which the sun never set' was literal: the empire spanned every time zone continuously.
Decolonization and gradual withdrawal
After World War II, Britain faced crippling debt and anticolonial movements. India, the crown jewel, gained independence in 1947. Successive colonies followed: Ghana, Nigeria, Kenya, and others in the 1950s-60s. The Suez Crisis in 1956 demonstrated Britain's limited military reach. By the 1980s, most formal colonies were gone, though Britain retained smaller territories and Commonwealth ties. The arc from mercantile expansion to imperial contraction to middle power took three centuries.