They have sent the foreign legion so they will be mostly foreigners who wanted French citizenship dying. It won't see parades of funerals with wailing French fathers and mothers in the streets so much as caskets without family in France. Some French officers will die but that will be it, maybe a few dozen at most. They'll just claim they were the mercenary arm and not national army regulars so their evaporation is not indicative of the west's strength.

I do expect that there will be serious domestic repercussions if that happens.