Instead of using spears and all of that back then, gunpowder gave soldiers the upper hand advantage during wars
No because they have advanced technologies!! =)
It made it easier because after that they didn't have to use swords or other similar weapons. Guns were faster than swords and slightly easier to use and handle. An arrow could penetrate a knight's...
Trench warfare is where soldiers lie down in narrow ditches for cover and fire their weapon from there. Warfare is just regular war.
It helped revolutionize tank warfare for the future, and changed man tactics.