The first “guns” were invented in the late Middle Ages. They looked like a metal tube on a stick with a little hole for gunpowder. It was fired with a little flame on another stick to ignite the gunpowder. Usually it took two people, one to hold and load the gun, and one to actually fire it! You would load it by pouring powder into it, putting a wad in, and then putting a bullet in. It was not too accurate and was relatively weak. Better firearms were later invented to make up for that. Cannons were around in the late Middle Ages too, and were first made out of a long “barrel” of wood! They were dangerous and could explode on the crew manning them!