In 21st century military slang “maginot mentality” is a derogatory description of outdated strategies, particularly those centered on fixed fortifications. The term comes from France’s Maginot Line which during WWII, failed spectacularly to stop Germany from overrunning France.
Histories of the Maginot Line usually conclude with the French capitulation in 1940. However the Maginot Line actually came close to being partially reactivated after WWII, and still later some of the emplacements served on in secondary or repurposed roles, in one case into the new millennium.
(The Maginot Line ouvrage at Hochwald, during WWII and during the early 21st century.)
(A bloc of the Rochonvillers installation of the Maginot Line being “nuclear hardened” by new construction during 1982.) (photo via marblehome.com website)