Warning violent topic:
On Daniel Boone tv show today an indigenous (native) American said he had killed a bear with a spear.
I just found out one spear is known as a bear spear, also
The giant dragons I often envision are of sci-fi movie legend/folklore, like godzilla. A group of scared people running from a 20+ foot/building size, bullet proof marine iguana (godzilla is based on a marine iguana, they are native to the galapagos). There are legends such as St. George fighting the dragon with a sword, and some African tribesman killing a long neck dragon.
I imagine you can fight off a dragon (which I believe is a large lizard) or lion, with a long spear or stick and maybe a sling or rock for long range. In Psalms shepherds had a rod and staff.
Other pre-gun weapons include: mace, types of boomerang, arrows.crossbow/fire arrows. They could have used more advanced technologies. Methane from poop can be explosive: example a group of cows with gas and a lantern starting a fire.
Don't be cruel to animals. thanks. Bears are endangered animals where I live.
Neanderthals were able to stalk and kill at close range, they were smarter and sturdier and more skillful than other hunters who had to rely on lighter weapons and distance.