In the 1960s, the Union Flag came down for good in 24 British colonies, marking the end of centuries of imperial dominance. This is the story of the British Empire as it's never been seen before, thanks to colorized archival footage spanning the Boer War in South Africa, the royal tours of Prince Edward, and Gandhi's peaceful protests. From its peak in 1919 after the Treaty of Versailles to Queen Elizabeth II's reinvention of the empire as a unified commonwealth of nations, this is a unique look at a transformative period in Britain's history.