I read William L. Shirer diary of his time in Nazi Germany. He stated many times that the French did not fight at all. There were a lot of French communists and they, along with unions ordered the soldiers not to fight.
They fought us in North Africa.
In his excellent book “The Rise and Fall of the Third Reich ch, Shirer also made the point that when Germany sent armies into Czechoslovakia after the Munich conference, Germany had five divisions on its border with France. France had 150 divisions. He observed that if the French armies had moved quickly and invaded Germany for treaty violations it would have ended Germany’s invasion of Czechoslovakia and ended Hitler.
“He stated many times that the French did not fight at all. There were a lot of French communists and they, along with unions ordered the soldiers not to fight.”
I think a bigger problem was that Catholic France saw what the communists had done in neighboring Spain from 1936-1939 (killing 7,000 priests, a dozen bishops, and a few hundred nuns) and preferred Hitler (who hadn’t done that - infact aided in stopping it) to Stalin (who armed and funded the perpetrators). France had no reason to fight in WWII, and they knew it; when Americans landing on the North African coast in 1942 were shot down by French soldiers defending their neutrality, those French knew exactly what they were doing.