Britain became the number one colonial empire in the world in 1920.

1mid-8th century. The United Kingdom of Great Britain and Northern Ireland, referred to as "Britain" for short, is located in the British Isles in the northwest of the European continent, surrounded by the North Sea, the English Channel, celtic sea, the Irish Sea and the Atlantic Ocean. After the opening of the new sea route, Britain embarked on the ranks of foreign colonial expansion, and successively defeated the Netherlands, France and other countries, becoming the number one colonial empire in the middle of the18th century. Colonization refers to a powerful country migrating to the areas it conquered and plundering the interests of the original local people.