"I would suggest that we will win," Mattis said. "It will be a war more serious in terms of human suffering than anything we've seen since 1953.
"It will involve the massive shelling of an ally's capital, which is one of the most densely packed cities on earth," Mattis said of Seoul, South Korea, which boasts a metro-area population of 25 million.
"It would be a war that fundamentally we don't want," Mattis said, but "we would win at great cost."
Mattis made clear that the US was nearing the end of its rope in dealing with North Korea, saying: "We're exhausting all possible diplomatic efforts in this regard."
"It would be a serious, a catastrophic war, especially for innocent people in some of our allied countries, to include Japan most likely," Mattis said.
http://www.businessinsider.com/mattis-north-korea-war-we-will-win-2017-6
