The Atomic bomb.
Atomicbomb.
the cannons
Cannons were the most powerful Revolutionary weapons.
The Atom Bomb
The atomic bomb!
After the first world war the USA became the most powerful one.
The cannon. If you mean powerfully based on accuracy then the rifle.
There can be no doubt that the most deadliest weapon of world war 2 was the nuclear bombs that dropped on Hiroshima.
No :/ Tanks, artillery and fighter planes could all top both the firepower and Anti-Tank/Infantry capabilities of this weapon. :P
the tank
Mustard Gas