1.The war changed all-encompassing
The world chanhed at the time of the war.Everybody tought it would be over by christmas 1914 but actualy it tormented the waring people for years.By 1916 there where mobilized over 50miljon people.Living conditions were really bad,there were food shortages,epidemics where spreading.Some countries even broke down due to the war(Russia).
2.New military equipment.
The great war took by rapid military equipment development.Chemic weapons develop the fastest.A very big jump where in the airforce,navy and tanks.
3.Changes in society.
In the begining of hearing the news of the war everybody where happy but the longer the war was the more people where tired of it.More and more deserts took place .
A lot of woman took the jobs where erlier the men where but they got paid much less.All of this helped to get better rights to woman.