France had a very strong communist party after WWII. If the French communist attempt a revolution, let's say in 1944 or 1945 while American troops are in the country, I can imagine a military dictatorship backed by US and Britain emerge in France.
Gaulist dictatorship ?
Or worse. Some Vichyist reactionaries.
I think another possibility is:
- Communism is much, much more effective than OTL (whatever the reasons are, maybe some democracy after 1968)
- in the 70s, communist parties begin to grow strong in western countries and it's plausible that they will win the elections and take power peacefully
- to prevent this, liberal and conservative parties approve military dicatorships and support coups in France, Great Britain, Germany etc. in the 80s
Didn't France nearly have a military coup during the Algeria crisis?