Scheduled for 19 August.
https://www.amazon.com/Maginot-Line-.../dp/0300277040
Usual disclaimer,
Ed
I feel it pertinent to add that I saw a captured German film about an attack against a French pillbox. Using a short ladder, a man dressed in little clothing climbed to the roof.
Suspended by the tops of his feet, a satchel charge slid from his back to his hand. Then it was hurled through the front slit. He pulled himself up, moved to the center of the roof, and lay down.
A brief puff came from the slit. Then German troops in rubber rafts navigated a narrow stream to move further inland.