What aspects of europe's nineteenth century history contributed to the first world war?

They were using masses of troops. the french on the first day marches out in a field in brieght colors just to get mowed down by german michine guns

or a nother good on is they had no good communication

heres a ww1 fact the stupidest thing done was the emperer of the austro hungaryian emiper declared war on sebia cause of what happened to his nephew. oh they never relly caout no that there are reconnicence planes