Shire gave Petain more than just these.
Shire thought, since directional mines are available, shouldn't there also be regular mines?
Isn't Petain skilled in defensive warfare?
How can defensive warfare lack mines!
With reverse slope, mines, and directional mines, the Battle of Verdun is practically planned out. No matter how Petain fights, he can't escape my shadow; he'll be recognized as following my tactics, and without a doubt.
Thinking this, Shire took out a notebook and sketched a flat round mine used in modern times, then drew the internal structure beside it, explaining as he drew: "The structure isn't complex. When the target steps on the pressure plate, the fuse is triggered. The internal spring mechanism pushes the firing pin, hitting the primer and causing an explosion."
Steed stood next to Shire, watching. Initially, he didn't react, but after hearing Shire's explanation, he understood: "This is a mine?"
Staring at the completed drawing, he was dumbfounded.
