What if the Franco-British Union Formed? | Alt History

An alternate history of France and Britain in which during World War 2 they unite as a single Franco-British Union in order to defeat Germany and preserve the existence of their empires!

Been a long time, glad to be back and I hope you all enjoy!

If you want a video explaining the logic behind the scenario tell me in the comments down below!

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Notes:
1: The United India-Cyprus comparison relates to the division of Cyprus between the Greek and Turkish parts (when the country became independent Britain put some provisions in the constitution to protect the Turkish minority), the reference has nothing to do with religion, just to clear that up.
2: Yeah I know I put joking instead of jokingly... whoops lol.