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Anonymous
Mustard gas, Tanks, Airplanes
Devon Smith ∙
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Aircraft, for one. Machine guns, tanks, field artillery ( an improvement on the cannon ), better explosives and armour. Tanks and machine guns are two
Wiki User
Some are
germ warfare
Because the old weapons become to common and considered to be to predictable
Two nuclear weapons ended World War 2.
You can't fight a war without weapons.