North Korea Warns US-South Korea Nuclear Submarine Deal Could Trigger Domino Effect

Intermediate | November 24, 2025

✨ Read the article aloud on your own or repeat each paragraph after your tutor.

Rising Tensions on the Korean Peninsula – North Korea Nuclear Domino Effect

North Korea issued a sharp warning about a potential North Korea nuclear domino effect, emphasizing that the submarine deal could destabilize the region. to the United States and South Korea after the two allies moved forward with a nuclear-powered submarine cooperation plan. According to Reuters (Nov. 18, 2025), Pyongyang claimed the agreement could trigger a North Korea nuclear domino effect** in the region, leading other countries to consider their own nuclear options.

Why This Deal Matters

Under the arrangement, the US would support South Korea in gaining nuclear-powered submarine technology. While these submarines would not carry nuclear weapons, North Korea argues that the move undermines strategic stability. The North Korean foreign ministry described the agreement as a “dangerous act” that could push the region closer to conflict. (Reuters Source)

Regional Reactions and Concerns

Security analysts note that North Korea often uses strong language in response to US-South Korea cooperation, but this warning is particularly serious. Some experts say Pyongyang may use the submarine deal as justification for future weapons testing. Others worry that rising tensions could encourage more military spending across Asia.

The Bigger Picture

North Korea has recently increased its missile launches and military demonstrations. At the same time, the US and South Korea have expanded joint defense exercises, emphasizing deterrence. The submarine deal adds another layer to an already tense dynamic.

What Comes Next?

While the US says the cooperation is meant to strengthen defense and deterrence, North Korea insists it is evidence of “hostile policy.” Regional observers suggest that more diplomatic talks are urgently needed to avoid miscalculation.

Vocabulary

Domino effect (noun) – a situation where one event causes a series of similar events.
Example: “Experts worry the deal may cause a nuclear domino effect in the region.”
Undermine (verb) – to weaken or damage something.
Example: “North Korea says the deal undermines strategic stability.”
Justification (noun) – a reason or explanation for an action.
Example: “Some fear the deal gives Pyongyang justification for more weapons tests.”
Deterrence (noun) – actions meant to prevent an attack.
Example: “Joint military exercises are designed for deterrence.”
Escalation (noun) – an increase in intensity or seriousness.
Example: “Analysts warn of possible military escalation.”
Strategic stability (noun) – a situation where major powers are unlikely to go to war.
Example: “The submarine deal could affect strategic stability.”
Foreign ministry (noun) – a government department that manages international relations.
Example: “The North Korean foreign ministry released a strong statement.”
Military demonstration (noun) – a show of military strength.
Example: “North Korea conducted several military demonstrations this year.”
Regional observers (noun) – experts who watch political or security events in a region.
Example: “Regional observers warn of rising tensions.”
Miscalculation (noun) – a mistake in judgment.
Example: “Diplomacy is needed to prevent dangerous miscalculation.”

Discussion Questions (About the Article)

Why did North Korea warn about a “nuclear domino effect”?
What does the submarine deal involve?
How have the US and South Korea strengthened their defense cooperation?
Why do experts believe this warning is more serious than usual?
What diplomatic steps could reduce tensions?

Discussion Questions (About the Topic)

Do you think nuclear-powered submarines increase or decrease security?
How should countries balance defense and diplomacy?
Why is transparency important in military agreements?
What risks come from rising military tensions in a region?
Should nations pursue nuclear technology for deterrence?

Related Idiom

“Walking on thin ice” – being in a risky or dangerous situation.

Example: “With rising tensions, the region may be walking on thin ice.”

📢 Want more tips like this? 👉 Sign up for the All About English Mastery Newsletter! Click here to join us!

Want to finally Master English but don’t have the time? Mastering English for Busy Professionals is the course for you! Check it out now!

Follow our YouTube Channel @All_About_English for more great insights and tips!

This article was inspired by: Reuters