Answer:
Mainly Trench Warfare was popularized by the use of new mechanized weapons such as Artillery, and also because of the mass victories in the east on germany's side, Russia used these as a form of slowing them down and to protect their troops, but often these trenches hurt these men by disease, starvation, etc.
No se han dicho que no se ha dicho que ha sido un poco de teléfono de vuelta a las dos a las que han dicho nada de que no se han dado la cara para la que han
I think it’s Nervous system
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