[byroot]

> created an impenetrable fortress along the border

Absolutely not. No-one ever expected the Maginot line to hold more than a few weeks.

It's goal was two-fold:

  - Delay the invasion by a few weeks to give time for mobilization.
  - Force Germany to go through Belgium again to ensure the involvement of the United Kingdom which was guaranteeing Belguim.

And both goals were achieved.

> Another failure was that the massive gun turrets periodically embedded in the fortification were designed so that they couldn’t be rotated to point back toward France

That's absolutely not a failure, it's a lesson learned from WWI: https://en.wikipedia.org/wiki/Fort_Douaumont

[drc500free]

The "Maginot Line didn't work" meme is up there with the "The Chevy Nova didn't sell because No Va means Don't Go in Spanish" meme. Stuff I was taught in school by well-meaning teachers who never really verified anything.