AHC: Anglo-American Union (not sure if ASB)

As the title says, you guys need to propose situations in which the USA and the UK, unite economically, politically and, militarily. Posting this in Pre 1900 as well. Bonus points if, well, you achieve this at all, as it seems a little ASB to me...
 
Maybe with Dunkirk POD? USA horrified at prospect of UK falling under German occupation offers union and Churchill jumps at the chance, Parliament accepting it, fearing imminent German invasion?

Just a thought.
 
Basically, the only way i see it happening is if a nasty ideologically opposed nation controls all of europe, more likely the soviets than nazis.

Then a nato with political structure, or a un with teeth or something might well develop. It would certainly include the us, uk, canada and oz. A simple us,uk merger is actually harder.
 
Central Powers win WWI decisively, the US doesn't get involved and maintains strict neutrality. France is basically Finlandized by Germany, which becomes the overwhelmingly dominant power on the continent.
Over time, beginning with an economic and trade union, the US and the UK are drawn closer together, primarily from economic necessity. From there, 20-30 years of erosion of national autonomy a la the EU cause a de facto, if not de jure union.
 
In the 1980s a satellite malfunction leads to a nuclear Third World War. At some point in the war, the US annexes the UK (or the UK requests annexation).
 

GarethC

Donor
ASB.

My most plausible attempt actually starts with the words "After the success of Operation Sealion..."

A de facto union might occur after the US reconquers an occupied UK, and then decides to maintain its own occupation out of Red Scariness.

There's too little equality of power between the two states to make any terms acceptable to both of them at the same time.
 
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