By Daily Touch Insights Editorial Team
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WORLD & DEFENCE — South Korean President Lee Jae Myung has urged his country to prepare for the “worst-case scenario” while reaffirming the importance of the United States alliance, after U.S. President Donald Trump ordered the Pentagon to substantially reduce joint military exercises with South Korea.
Trump's decision has raised concerns in Seoul about the future of military readiness on the Korean Peninsula, although South Korean officials have also expressed hope that Trump's relationship with North Korean leader Kim Jong Un could eventually help restart diplomatic engagement.
The annual Ulchi Freedom Shield exercises began on August 17 and are scheduled to continue through August 27. Trump said the exercises should be reduced, describing them as costly and potentially provocative toward North Korea. 0
Lee Calls for Preparation for the Worst
President Lee has responded by stressing that South Korea must strengthen its own ability to defend itself.
While maintaining that the U.S.-South Korea alliance remains essential, Lee has called for stronger national defence capabilities and continued preparation for possible security emergencies.
His message reflects a difficult reality for Seoul: South Korea wants to preserve its close relationship with Washington while also ensuring that its security does not depend entirely on decisions made in Washington.
Trump Orders a Reduction in Joint Military Exercises
Trump directed Defense Secretary Pete Hegseth to substantially reduce joint military exercises with South Korea.
Trump cited his relationship with Kim Jong Un and argued that the exercises could send an inappropriate and hostile signal to North Korea.
The decision came shortly before the latest Ulchi Freedom Shield exercises were due to begin, making the timing particularly significant for military planners in Seoul and Washington. 1
Why the Exercises Matter
Joint military exercises are designed to ensure that American and South Korean forces can operate together during a crisis.
They involve command-and-control procedures, military simulations and other forms of coordination intended to maintain readiness.
The value of such exercises is not simply the number of troops participating.
They allow commanders and personnel from both countries to practise working together before a real emergency occurs.
Reducing the exercises could therefore affect how frequently allied forces rehearse complex operations together.
South Korea Still Wants a Strong U.S. Alliance
Despite the concerns created by Trump's decision, Lee has continued to emphasise the importance of the alliance.
He has argued that a strong alliance strengthens South Korea's national security while also saying that Seoul should build greater independent defence capabilities.
The message is not necessarily that South Korea wants to move away from Washington.
Rather, Seoul appears increasingly interested in ensuring that it has greater control over its own military capabilities and decisions.
South Korea Wants Greater Control Over Its Military
Lee has also called for progress on transferring wartime operational control, or OPCON, from the United States to South Korea.
Under the current alliance structure, the United States and South Korea maintain an integrated command arrangement for wartime operations.
Lee has argued that the transfer should proceed without disruption during his presidency.
That objective could become more important if questions continue to emerge about the scale and reliability of future U.S. military participation in the region. 2
North Korea Remains the Central Security Concern
The reason for the military exercises has not disappeared.
North Korea continues to maintain a large military force and advanced missile capabilities.
The country has also strengthened its relationship with Russia, including military cooperation connected to the war in Ukraine.
Those developments have increased concerns among South Korean and U.S. officials about North Korea's growing military experience and capabilities.
North Korea Has Opposed the Exercises
Pyongyang has historically condemned U.S.-South Korean military exercises, describing them as preparations for an attack.
Washington and Seoul maintain that the exercises are defensive.
Lee reiterated that position, saying the current exercises are intended to strengthen defence and are not designed to attack North Korea or increase tensions on the peninsula. 3
Trump's Relationship With Kim Jong Un Adds Another Dimension
Trump has repeatedly emphasised his personal relationship with Kim Jong Un.
His latest decision suggests that he believes reducing military exercises could create a more favourable environment for diplomacy with Pyongyang.
South Korean officials have also expressed hope that Trump's relationship with Kim could eventually lead to meaningful dialogue.
That creates an unusual situation in which Seoul is concerned about reduced military exercises while simultaneously hoping the policy could help open a diplomatic channel.
Seoul Faces a Difficult Strategic Balance
South Korea now has to balance several competing priorities.
It needs to maintain deterrence against North Korea, preserve its alliance with the United States, strengthen its own military capabilities and avoid unnecessary escalation with Pyongyang.
Those objectives do not always point in the same direction.
A stronger military posture can improve deterrence but may make diplomacy more difficult, while reducing exercises could help diplomatic engagement but raise questions about readiness.
South Korea Is Looking at More Independent Defence Capabilities
Lee has linked stronger national defence with the future of the alliance.
His administration has supported efforts to improve South Korea's independent military capabilities, including accelerating plans for a nuclear-powered submarine programme.
Such capabilities would not replace the U.S. alliance, but they could give Seoul greater strategic flexibility.
The broader objective is to ensure that South Korea can respond effectively even if the level of American military involvement changes.
The U.S. Military Presence Remains Important
South Korea continues to host a substantial U.S. military presence.
American forces stationed on the peninsula form a major part of the alliance's deterrence structure.
For Seoul, therefore, the issue is bigger than military exercises alone.
Any significant long-term change in America's military posture in East Asia could influence South Korea's defence planning and its relationship with neighbouring countries.
China Is Also Watching
The future of the U.S.-South Korea alliance matters beyond the Korean Peninsula.
China closely monitors American military activity in East Asia and the security relationships between Washington and its regional allies.
A significant reduction in U.S. military exercises could therefore affect calculations involving not only North Korea but also the wider balance of power in Northeast Asia.
That makes the issue strategically important for the entire region.
The Biggest Question Is Deterrence
The central question is whether reducing exercises would actually weaken deterrence or whether it could create an opportunity for diplomacy without materially reducing South Korea's ability to defend itself.
There is no simple answer.
Military exercises are only one component of deterrence. Intelligence, weapons systems, troop deployments, command structures and the credibility of political commitments also matter.
But exercises provide an important opportunity to test how those components work together.
Diplomacy Could Still Change the Situation
South Korean officials have not rejected the possibility that Trump's approach could produce diplomatic benefits.
Lee's government has indicated that improved relations between Washington and Pyongyang could create an opportunity for dialogue and greater stability.
The critical question is whether North Korea would respond positively to the change in U.S. policy.
If diplomatic talks resume, the reduction in exercises could become part of a wider confidence-building process.
If talks fail, however, South Korea could face greater pressure to strengthen its independent military capabilities.
Why the ‘Worst-Case Scenario’ Matters
Preparing for a worst-case scenario does not necessarily mean expecting war.
For governments responsible for national security, contingency planning is a basic requirement.
Lee's warning can therefore be understood as a demand that South Korea maintain sufficient military readiness regardless of how U.S.-North Korean diplomacy develops.
The goal is to avoid being strategically unprepared if diplomatic expectations fail.
The Alliance Is Entering a More Complicated Phase
The U.S.-South Korea alliance has remained one of the most important security partnerships in Asia for decades.
But the latest dispute over military exercises shows that the alliance is adapting to a different strategic environment.
Washington is increasingly asking allies to carry more of their own defence burden, while Seoul is seeking greater autonomy without abandoning the American security relationship.
How those objectives are reconciled could shape the alliance for years.
Our Perspective
Lee's warning deserves attention, but it should not be interpreted as evidence that South Korea is immediately facing an attack.
The more important issue is strategic resilience.
South Korea should not assume that U.S. military policy will always remain unchanged, just as Washington should not assume that Seoul will indefinitely accept every change in American strategy without strengthening its own capabilities.
The strongest alliance is not one in which one side is permanently dependent on the other; it is one in which both partners remain capable, prepared and strategically valuable.
Conclusion
South Korean President Lee Jae Myung has urged the country to prepare for worst-case security scenarios after President Donald Trump ordered a substantial reduction in joint U.S.-South Korean military exercises.
The decision has raised concerns about military readiness, although Seoul continues to emphasise the importance of the U.S. alliance and hopes Trump's relationship with Kim Jong Un could eventually contribute to renewed diplomacy.
At the same time, Lee is pushing for stronger independent defence capabilities, greater progress toward wartime operational-control transfer and continued development of advanced military systems.
South Korea's challenge is now clear: preserve the strength of its alliance with Washington while building enough independent military capacity to remain secure even when U.S. policy changes.
