Mmm, where the British units present at Maginot before the outbreak of war with Germany?
I think even then, France has a decent chance of defending the Maginot against a German attack. If it mobilizes all its forces from the globe for sure.
I’ve been debating building nothing as France but Militia on Maginot, and exploit that huge defense bonus.
Its the Lightning War feature that really screws things up for France sometimes, especially by forcing France to protect multiple territories in Picardy and Maginot.