Mattis Warns 'Massive' Response over Accelerating N.Korea Nuclear Attack Threat

US Secretary of Defense Jim Mattis and South Korean Defense Minister Song Young-moo. AFP photo
US Secretary of Defense Jim Mattis and South Korean Defense Minister Song Young-moo. AFP photo
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Mattis Warns 'Massive' Response over Accelerating N.Korea Nuclear Attack Threat

US Secretary of Defense Jim Mattis and South Korean Defense Minister Song Young-moo. AFP photo
US Secretary of Defense Jim Mattis and South Korean Defense Minister Song Young-moo. AFP photo

US Defense Secretary Jim Mattis said Saturday the threat of nuclear missile attack by North Korea is accelerating, warning Pyongyang of a "massive military response" to any use of nuclear weapons.

In remarks in Seoul with South Korean Defense Minister Song Young-moo at his side, Mattis accused the North of illegal and unnecessary missile and nuclear programs — and vowed to defeat any attack.

Mattis said North Korea engages in "outlaw" behavior and that the US will never accept a nuclear North.

He added that regardless of what the North might try, it is overmatched by the firepower and cohesiveness of the decades-old US-South Korean alliance.

"North Korea has accelerated the threat that it poses to its neighbors and the world through its illegal and unnecessary missile and nuclear weapons programs," he said, adding that US-South Korean military and diplomatic collaboration thus has taken on "a new urgency."

"I cannot imagine a condition under which the United States would accept North Korea as a nuclear power," he said.

Mattis, on a trip to Seoul for annual defense talks, maintained that diplomacy remained a "preferred course of action" but stressed, "our diplomats are most effective when backed by credible military force".

"With that said," he added, "make no mistake — any attack on the United States or our allies will be defeated, and any use of nuclear weapons by the North will be met with a massive military response that is effective and overwhelming."

Mattis' trip comes ahead of Trump's first presidential visit to South Korea next month as part of his Asia tour which also includes Japan, China, Vietnam and the Philippines. 

Trump entered office declaring his commitment to solving the North Korea problem, asserting that he would succeed where his predecessors had failed. His administration has sought to increase pressure on Pyongyang through UN Security Council sanctions and other diplomatic efforts, but the North hasn't budged from its goal of building a full-fledged nuclear arsenal, including missiles capable of striking the US mainland.



Australia, Britain Sign 50-Year AUKUS Submarine Partnership Treaty

Australian Prime Minister Anthony Albanese (C) poses with Australia’s Foreign Minister Penny Wong (L), Britain’s Foreign Secretary David Lammy (2nd-L), Britain’s Defense Secretary John Healey (2nd-R) and Australia’s Deputy Prime Minister and Minister for Defense Richard Marles (R) before the start of the Australia-UK Ministerial Consultations (AUKMIN) meeting in Sydney on July 25, 2025. (AFP)
Australian Prime Minister Anthony Albanese (C) poses with Australia’s Foreign Minister Penny Wong (L), Britain’s Foreign Secretary David Lammy (2nd-L), Britain’s Defense Secretary John Healey (2nd-R) and Australia’s Deputy Prime Minister and Minister for Defense Richard Marles (R) before the start of the Australia-UK Ministerial Consultations (AUKMIN) meeting in Sydney on July 25, 2025. (AFP)
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Australia, Britain Sign 50-Year AUKUS Submarine Partnership Treaty

Australian Prime Minister Anthony Albanese (C) poses with Australia’s Foreign Minister Penny Wong (L), Britain’s Foreign Secretary David Lammy (2nd-L), Britain’s Defense Secretary John Healey (2nd-R) and Australia’s Deputy Prime Minister and Minister for Defense Richard Marles (R) before the start of the Australia-UK Ministerial Consultations (AUKMIN) meeting in Sydney on July 25, 2025. (AFP)
Australian Prime Minister Anthony Albanese (C) poses with Australia’s Foreign Minister Penny Wong (L), Britain’s Foreign Secretary David Lammy (2nd-L), Britain’s Defense Secretary John Healey (2nd-R) and Australia’s Deputy Prime Minister and Minister for Defense Richard Marles (R) before the start of the Australia-UK Ministerial Consultations (AUKMIN) meeting in Sydney on July 25, 2025. (AFP)

Australia’s government said on Saturday it signed a treaty with Britain to bolster cooperation over the next 50 years on the AUKUS nuclear submarine partnership.

The AUKUS pact, agreed upon by Australia, Britain and the US in 2021, aims to provide Australia with nuclear-powered attack submarines from the next decade to counter China’s ambitions in the Indo-Pacific. US President Donald Trump’s administration announced a formal review of the pact this year.

Defense Minister Richard Marles said in a statement that the bilateral treaty was signed with Britain’s Defense Secretary John Healey on Saturday after a meeting in the city of Geelong, in Victoria state.

“The Geelong Treaty will enable comprehensive cooperation on the design, build, operation, sustainment, and disposal of our SSN-AUKUS submarines,” the statement said.

The treaty was a “commitment for the next 50 years of UK-Australian bilateral defense cooperation under AUKUS Pillar I,” it said, adding that it built on the “strong foundation” of trilateral AUKUS cooperation.

Britain’s ministry of defense said this week that the bilateral treaty would underpin the two allies’ submarine programs and was expected to be worth up to 20 billion pounds ($27.1 billion) for Britain in exports over the next 25 years.

AUKUS is Australia’s biggest-ever defense project, with Canberra committing to spend A$368 billion over three decades to the program, which includes billions of dollars of investment in the US production base.

Australia, which this month paid A$800 million to the US in the second instalment under AUKUS, has maintained it is confident the pact will proceed.

The defense and foreign ministers of Australia and Britain held talks on Friday in Sydney on boosting cooperation, coinciding with Australia’s largest war games.

As many as 40,000 troops from 19 countries are taking part in the Talisman Sabre exercises held from July 13 to August 4, which Australia’s military has said are a rehearsal for joint warfare to maintain Indo-Pacific stability.

Britain has significantly increased its participation in the exercise co-hosted by Australia and the United States, with aircraft carrier HMS Prince of Wales taking part this year.