Ww1 German shell (French propaganda)

[MINENAZ16]

Hello,
Herewith, an article about German shell "Obus mère-gigogne" in the newspaper "J'AI VU" 1918.
I'm quite sure it's a civilian propaganda...
This shell is supposed to fire bullets in the back of soldiers...
Regards

 

[Alpini]

It's more an idea of the middle Ages, found in books of that era.