A trench tool is beneficial to the WW1 because you could make trenches much faster than without one. Also, because the countries were fighting with advanced items and older military tactics it was really just a stand-fire and building trenches made sure that you stay alive longer. Sometimes, even, these tools were used as weapons in hand-to-hand combat(10 Things).

Because of the advancement of military weapons, steel helmets were made to decrease the chance of getting hit in the head with shrapnel, bullets or other projectiles(10 Things).

Camouflage was very helpful in WW1 because it was harder to notice because camo is not as noticeable as coats but camo blends in with the background(10 Things).

Gas Masks were useful because they kept poisonous gas from going to the face were you possibly breathed it in. Also served as some protection towards the face because the mask was thick material(10 Things).

Vaccines were really useful because the soldiers were getting sick being close together and under worse conditions and getting typhoid a lot. Because of vaccines being used lots of deaths were avoided(10 Things).