Probably artillery; it was responsible for many of the deaths in World War 1.
The nuclear bomb
Atomicbomb.
Big guns (i.e. artillery, not hand weapons).
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 most advanced nation in world war 2 was probably the united states.
There can be no doubt that the most deadliest weapon of world war 2 was the nuclear bombs that dropped on Hiroshima.
the tank
Propaganda.
Mustard Gas
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.
It should be the bayonet