Britain, also known as the United Kingdom (UK), has not gained its independence from another country in the way that many former colonies have. The United Kingdom is a sovereign nation, and its history primarily involves its own colonial expansion and imperial rule over other countries, rather than gaining independence from another nation.
However, some of its constituent countries, such as Ireland, did gain independence from the United Kingdom. The Republic of Ireland (Eire) became independent from the United Kingdom in 1922, while Northern Ireland remained part of the UK. This process led to the formation of the Irish Free State, which later became the Republic of Ireland.