Firearms
Who invent the first gun
The first gun was invented by the Chinese because shortly after they invented gunpowder. It was very simple since you would have to make it by hand. So to fire it you would have to hold a flame of some sort up to it to ignite the gunpowder.
who is credited of bringing it back to life and in what year did it originate
The person that brought it back to life was a german inventor named peter peck. The first gun originated in 1288
Difference in the guns.
The difference was the renaissance version was able to fire with one hand unlike the first one when you had to have two hands. The reason why this is possible is that we advanced in building things in general.
The purpose.
The purpose of it was to defend and hunt. Then also it was an alternative for a ranged weapon besides a bow. If the gun wasn't made America might not be as powerful as it is. Then also some machines wouldn't be invented.