Tentacle Raep.
There are a lot of answers when it comes to Japanese weapons. But the most common Japanese weapon is probably the katana which is a traditional Japanese samarai sword that was used in ancient wars in Japan
A paper clip is not the deadliest weapon in the world. In fact, the weapon that can do the most damaged when used by man is a flamethrower.
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nuke
The Human Ingenuity.
There can be no doubt that the most deadliest weapon of world war 2 was the nuclear bombs that dropped on Hiroshima.
The most deadliest weapon today, as of September 2013, is going to be a matter of opinion. However, a nuclear weapon is probably the most deadliest of them all as it vaporizes everything in a certain radius and makes the area uninhabitable for years.
B2
musket
HuMan mind
The spartan
The deadliest weapon during the Elizabethan times was a cannon.