The Imperial Federation refers to a series of proposals in the late 19th and early 20th centuries to create a federal union to replace the existing British Empire, presenting it as an alternative to colonial imperialism. No such proposal was ever adopted, but various schemes were popular in Australia, Canada, New Zealand, and other colonial territories. The project was championed by Unionists such as Joseph Chamberlain as an alternative to William Gladstone's proposals for home rule in Ireland.