I made a few tweaks as part of my review, please check that you agree with these;
I think that generally the article is using US English variation, which is fine, however, the word "metres" appears a couple of times (this is British English spelling). I think this is occuring because of the conversion templates. I think if you want them to use US spelling, you need to add the following code: "|sp=us";
I suggest wikilinking the term "salient" on first mention;
I suggest adding a small clause here explaing why it was too late (the start of the war, presumably): "It was too late to be built, with a projected construction time of 18 months";
in the Design and construction section, what is a "cloche" - is there some way this can be explained, or linked? (possibly Maginot line#Armoured cloches);
in the Manning section, there is an issue with punctuation: "The 1940 manning of the ouvrage under the command of Lieutenant Bourguignon. comprised 97 men and 3 officers of the 155th Fortress Infantry Regiment (155th RIF) and the 169th Position Artillery Regiment (169th RAP)";
there is some inconsistency in style presentation, for instance "2nd Army" and "Second Army" - these should be the same as they are essentially proper nouns;
in the References section, the ISBN for one of the works doesn't seem to be correct. Can you please check this if possible?