Though not a direct response to the "fire and fury" statement, North Korea's army announced hours after that it was preparing a plan for missile strike on the USA territory of Guam should Washington carry out military action against the DPRK. "How often do you see France, China, Russia and the US ... voting unanimously on any issue?"
And while Mattis warned on Wednesday that North Korea would be "grossly overmatched" by the USA and its allies if a military conflict were to break out, some senior administration officials have provided a counterpoint to the President's more inflammatory rhetoric.
It is the second time this week that a key member of the USA administration has tried to calm the waters after bellicose comments from the president.
"The tragedy of war is well enough known", Mattis said, responding to a question about the human toll of a nuclear confrontation between the DPRK and the U.S.
He told reporters that the diplomacy effort spearheaded by Secretary of State Rex Tillerson and U.N. Ambassador Nikki Haley "has [gained] diplomatic traction" and "is gaining diplomatic results", according to the BBC. "The Secretary General welcomes all initiatives that will help deescalate tensions and welcomes a return to diplomacy".
President Donald Trump says he's planning to add billions of dollars to the nation's anti-missile programs.
"If North Korea does anything in terms of even thinking about attack, of anybody that we love or we represent or our allies or us, they can be very, very nervous", Trump said.
The warning followed Trump's tweets earlier in the day that the USA nuclear arsenal is "now far stronger and more powerful than ever before". That's a Nuclear Posture Review that will set the administration's nuclear policy, per WaPo, after which modernization efforts would take years.
Trump is also warning about the dangers of nuclear weapons, saying he'd like to "de-nuke the world".
"The UK stands shoulder to shoulder with the U.S.in tackling this threat and many others".
North Korea will continue to be grossly overmatched by the US and its allies, he said, "and would lose any arms race or conflict it initiates".
"The president was addressing reporters during his vacation at his New Jersey golf club before a security briefing with top advisers".
Trump earlier showed no contrition about his remark on Wednesday that aggression by North Korea would be met with "fire and fury like the world has never seen".
On Thursday, U.S. and Japanese troops began an 18-day live fire exercise on the northern Japanese island of Hokkaido, which was to include rocket artillery drills and involve 3,500 troops.
'His view and the view of the administration is that the way to resolve the situation with North Korea.is through these economic sanctions.
North Korea has announced a detailed plan to launch a salvo of ballistic missiles toward the U.S. Pacific territory of Guam, a major military hub and home to U.S. bombers, a move that if carried out would be its most provocative missile launch to date.
The United States and South Korea remain technically still at war with North Korea after the 1950-53 Korean conflict ended with a truce, not a peace treaty.