Big guns (i.e. artillery, not hand weapons).
The bayonet
The nuclear bomb
Atomicbomb.
Probably artillery; it was responsible for many of the deaths in World War 1.
The most widiy used weapon in the Veitnam war was the American M-16 rifle.
You can get them anywhere from Bezid.com to Ebay.com
the tank
There can be no doubt that the most deadliest weapon of world war 2 was the nuclear bombs that dropped on Hiroshima.
Mustard Gas
Propaganda.
The most common one that was used as a weapon in World War 1 is called the Artillery
The most common method was with artillery.It is NOT a biological weapon, it is a chemical weapon.
The Atomic bomb.
The A-bomb.
The nuclear bomb
Atomicbomb.
Probably artillery; it was responsible for many of the deaths in World War 1.
It should be the bayonet