Because the old weapons become to common and considered to be to predictable
germ warfare
GrenadesFlamethrowersTanksMachine gunsPoison gas
New inventions changed warfare during World War 1 by creating new weapons and creating more casualties. Some of the inventions during World War 1 were tanks, infantry rifles, and machine guns.
Same reason they always invent new weapons - to help them win. Superior weapons go a long way to help win a war. America has ruled the world because of superior fire power.
Everyone made new weapons and machines which improved the technological advances made by the world after the war.
Chemical weapons and the machine gun
M16
The new weapons of world war one were machine guns,Tanks,poison gas, and planes og WW1
Tanks
Germany did
germ warfare
in world war 1 Germany introduced the use of chemical weapons for instance the Mustard Gas artillery shells, theses weapons where mainly used by countries on there side.
Tanks & poison gas .
GrenadesFlamethrowersTanksMachine gunsPoison gas
Airplanes, poison gas, machine guns and tanks.
The war was the deadliest in history up to that point
New inventions changed warfare during World War 1 by creating new weapons and creating more casualties. Some of the inventions during World War 1 were tanks, infantry rifles, and machine guns.