Question

How did world war 1 change warfare

Answer 1

Also There was a treaty made that prohibited certain weapons in warfare such as Mustard gas, Flamethrowers, Plastic Landmines, etc.

(Cool Fact)
In ww1 when hitler was in the German army he was exposed to mustard gas and almost died because his mustache would not allow him to close his gas mask all the way

Answer 2

The first tanks were unreliable and hard to steer, however, they became more effective by the end of the war. Much of the war along the western front was fought using trench warfare. Both sides dug long lines of trenches that helped to protect the soldiers from gunfire and artillery.