Chemical weapons and the machine gun
The war was the deadliest in history up to that point
Mustard Gas Machine Guns Barbed Wire Mines All these were the reasons WWI was such a disaster
The First World War was the first real deadly battle, millions of men died. It was the first war with weapons such as machine guns, tanks and gas.
There can be no doubt that the most deadliest weapon of world war 2 was the nuclear bombs that dropped on Hiroshima.
M16
The new weapons of world war one were machine guns,Tanks,poison gas, and planes og WW1
hahahahaha
Tanks
American Civil War
Because the old weapons become to common and considered to be to predictable
Germany did
Some are