Mattis isn't the only Cabinet official contradicting the president's bellicose rhetoric about North Korea, which reached a new level earlier this month when Trump threatened nuclear strikes against North Korea if Kim Jong-un doesn't stop issuing threats of his own.
Pyongyang claimed the launch was in response to a joint USA and South Korean military exercise.
The show of force came two days after North Korea fired of an intermediate-range missile over Japan.
Kim called for more weapons launches into the Pacific Ocean in the near future.
Aside from the bombs dropped on Nagasaki and Hiroshima that arguably ended the Second World War, we have only a vague idea as to what a nuclear war would entail.
A joint mediation effort put forward by China and Russian Federation would involve a mutual pause in both missile tests by North Korea as well as the joint South Korean-US military exercises by Seoul.
"I made clear how strongly the United Kingdom condemns the launch", Mr Field said.
The latest remarks are likely to add to confusion over official USA policy over how beat to deal with the nuclear threat posed by North Korea.
"North Korea's actions are a threat to our allies, partners and homeland, and their destabilizing actions will be met accordingly", Gen. Terrence J.
'The UN Security Council has put through several resolutions and sanctions have all along been put in place but everyone can see whether they've had actual results, ' she added.
A medium-range ballistic missile target is launched from the Pacific Missile Range Facility on Kauai, Hawaii, during a defense test on August 29, 2017.
Wednesday's statement was the first time the North has acknowledged sending a missile over Japan's main islands.
In phone call on Friday, Trump and his South Korean counterpart Moon Jae-in agreed to enhance Seoul's deterrence against North Korea by boosting its missile capabilities, Yonhap reported, citing Seoul's presidential office, Cheong Wa Dae.
"We will continue developing ballistic missile defence technologies to stay ahead of the threat as it evolves", he said. That has happened despite further global sanctions aimed at squeezing Kim's economy.
Mr Trump had initially responded by reiterating that "all options are on the table" when it comes to dealing with the state and has repeatedly stressed that he is ready to use military options.