no
If by your weapons, you mean ours (earths) weapons, then i only believe nuclear missiles are strong enough to defend us, although it would create havoc it would still be able to defend us long enough. Bullets and tank shots are no use at all. So yes, Earths weapons are strong enough to defend an alien attack.
No they did not because they were juts not strong enough.
It depends on the samuri. if they believe that they are strong and that no one can defeat them they make their own weapons. if they have doubt in themselves they will get a professional to make their sword.
Assyrians
They had fire and weapons strong enough to kill animals (and other cavemen.)
one conflict was ashes pikachu was not strong enough to defeat gary's blastoise
Just train pokemon until you are strong enough to beat her.
To defeat him you must level-up until are strong enough and keep trying!
It wasn't a river that served as a strong barrier to invasion in China. It was the Pacific Ocean that served as a strong barrier to invasion.
He wanted to make his kingdom strong enough to defeat the mighty persian empire.
You can defeat a lesser demon with regular weapons and armor, if you are low level, I suggest that you either get stronger first, or if you have a strong ranger skill, attack with a distance with a crossbow while wearing ranger armor.
The dynastic cycle happens due to the mandate of heaven, people start saying that they were given the mandate of heaven. When people start to say this they have a civil war and if the challenger wins a new dynasty begins.