The airplane, the submarine, the machine gun saw its first real widespread use, chemical weapons, flamethrowers.
They were not involved
New Zealand got involved in World War I in August of 1914.
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
No nuclear weapons were used in the Korean War.....
Because the old weapons become to common and considered to be to predictable
Some are
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.