What is the impact on WW1 of the use of howitzers?
So to start this, what is the difference between a gun and a howitzer. So, a field gun is an artillery that had long barrels with flat trajectories. While, mortar is actually an indirect infantry support. with high elevation but short barrels. Howitzers are a mix of both, thus giving it a "indirect field support".
First, it provided the artillery batteries to have indirect fire support. Indirect fire support means that it doesn't need a direct line of sight to shoot down enemies. This meant that the artillery regiments can stay beyond the front lines so not to expose them to enemy fire. Because if you put an artillery beside your infantry, your artillery will be subjected to sustain small arms enemy fire. As such, indirect fire weapons can shoot above your friendly troops.
Second, it can do plunging fire. What do you think will happen if a fixed horizontal trajectory gun tried to attack a trench system, it will just go pass by the trench and it won't do any much of significant damage. The higher, the angle the more chances of hitting the inside of the trench
Third, it will work well in counter-battery fire because it can't be fired from concealed dug-outs but still be able to fight back. thus reducing the chance of an enemy flat trajectory gun from hitting them.
So this created a lot of major advances in warfare, since in the start of WW1, the role of modern artillery wasn't quite well known. And gave all sides huge quantities in the trench warfare that lived up the battlefronts of WW1