The Imperial Federation in OTL was a late-19th early-20th century proposal to create a federated union in place of the existing British Empire. Though World War I ended debate about the union, in some timelines of the multiverse the Imperial Federation or an organization with a similar purpose does exist:
- Commonwealth (Treaty of Sévres)
- Imperial Commonwealth (Central World)
- Imperial Commonwealth Federation (Twilight of a New Era)
- Imperial Federation (Communist World)
- Imperial Federation (Dai-tō-a)
- Imperial Federation (George Washington Survives)
- Imperial Federation of Britain (Franz's World)
- United Britannic Commonwealth (Chamberlain's Legacy)
- United Commonwealth (13 Fallen Stars)
- United Kingdom of the British Empire (Finlandia)