The "United Kingdom of Great Britain and Ireland" was a political entity that existed from 1801 until 1922. It was formed by the union of the Kingdom of Great Britain, which included England, Scotland, and Wales, with the Kingdom of Ireland. This union aimed to create a stronger political and economic alliance between the nations. In 1922, most of Ireland left the United Kingdom to become the Irish Free State, leading to the current name, the "United Kingdom of Great Britain and Northern Ireland." Today, the UK consists of England, Scotland, Wales, and Northern Ireland.