WI Foch Lives?

This is something of a companion to the WI Petain dies threads that have been going around recently.
Since Petain and Foch were roughly the same age (born 1856 and 1851 respectively) it seems to me that if we can kill off Petain with natural causes there ought to be a way to have Foch live through WW2 instead. Unlike many in the French government, Foch seemed to have been more on the ball in predicting the next war and was also a very good military commander with great respect from WW1. I honestly don't know enough about the man's personality but it seems like Foch would have been considerably less likely to go "dark side" than Petain. So would a France left with Foch instead of Petain be more capable of fighting the Germans in WW2?
 
From a military perspective, Foch, a strong proponent of the offensive doctrine in 1914, who understood first the power of modern weapons, including tanks and planes, on a strategic level, might lend a more attentive ear to the supporters of a mechanised force, like Estienne or De Gaulle. You may have a better French doctrine in 1940, although Weygand, intially Foch's protégé, would probably be the commander in cheif right from the start.

Politically, just...no. Foch was a devout catholic and he would have been suspected of reactionary tendencies way before Petain exposed his OTL. Petain was actually considered a republican until 1938-1939, when he accepted the French embassy in Francoist Spain.
 
Then there's of course the issue that Foch would already be 88 in 1939. Even if he still maintained his senses and wasn't senile, how much influence would a retiree have on French strategy or the political will to fight?

I think that any accomplishments of Foch would have to take place in the 1920s, though it could result in significant butterflies.
 
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