Chemistry is just mixing chemicals. Some chemicals do not like to co-mingle. No one survives a war, not even the names on the wall. Medals and ribbons are like government droppings, it feels good doing it, so have a war. Governments like war because it keeps the Defense Department people off the streets.
War also makes for great research in better, new and improved killing.
Therefore, war creates employment, so let's go start a war. Do you know how to start a war, piss off a friend. A good war requires lots of death, mutilations and munitions. Some warriors are war hero's because they did not know better. The non-hero's never got the chance.