War what is it good for ?

Hey guys don't know if you have already heard about it but north Korea dictator Kim Jong-un has declared the state of war against his neighbor South Korea and started to threat the USA reaching the point of preparing their missiles and pointing them at the USA territory. According to the White house declarations this actions are being taken seriously and if North Korea decides to attack to the United States of America, They are more than prepared in order to defend them selves and their allies. Without a shadow of a doubt if this situation get worse a world war might take place hope that doesnt occur even though we will speak about it soon !