The effects on the United States- Another war, is not in the best interests of the United States. Their tremendous debts already incurred in fighting in the middle east, the trillions spent there over the 10 or more years, would definitely cripple its economy. I would not think the USA could handle any more theaters of war. Their is no more money in the piggy bank. I do not see the USA placing troops in this theater. But, watch for creating an air superiority and bombs falling nonstop from the sky.
I say this, but there would be a boom in manufacturing of weapons. If a war would occur, I expect the USA and South Korea would win in a very short matter of time. Perhaps months. But, heavy bombing would have to continue. And continue, for months on end. Maybe even nuclear war, if the North would unleash a nuke.
A nuke would not be in the best interests of North Korea to launch. I do think that the USA would just love to have an excuse to vaporize this dictatorship. It would be a sad, tragic event, for the already suffering people of North Korea.
Any way anyone looks at it, it is always a lose lose situation for North Korea.
And the people of North Korea has always suffered. Having to worship a leader that lives off of the toil, starvation, fear, of their very own people. And this new round of rhetoric, and eventual possible action, may cause even more suffering. Just because of some loose dictator.
Maybe it will not get that far. Lets hope for peace first, and total freedom for the persecuted people of North Korea.