Good post Thorlifter, and it goes for all Europe esp. as well, certainly gives food for thought.
It really was the birth of gunpowder and the following introduction of firearms and cannons to the battlefield which changed warfare most drastically from one century to the next.
Firearms and cannons sort of made war more "civil" so to speak (Not that war is ever civil) and less brutal than before. Before guns were available you had to get up close and personal to your opponent and then slaughter him by either stabbing him, cleaving him in two or smashing him to death, extremely messy brutal business!
Now gunpowder wasn't all good news for the soldier though as it brought new issues to the table. The introduction of firearms meant that the number of casualties (dead + wounded) on the battlefield increased drastrically, and suddenly there was a huge need for skilled medical surgeons physicians and new methods to treat the wounded.
The wounds an 18th - 19th musket ball would generate if it hit someone were often quite horrific, and a hit to any of your limbs was highly likely going to result in it having to be amputated. The typical musket ball was of a large caliber, round and made out of soft metal, either lead or tin, and it was heavy. If you were hit in the thigh by such a round the sheer kinetic energy (heavy projectile) would first ensure that the projectile would blast through your thigh bone, shattering it, and then out the back where the softness of the projectile meant it acted just the same as todays hollow point projectiles, creating a large and nasty exit wound. Shrapnel from cannon balls often had the same effect.
In short the introduction of gunpowder forced a rapid acceleration in technology methods within the medical world.