South Korea Rules Out Military Role in Iran War

Published: 18 September 2026. The English Chronicle Desk. The English Chronicle Online.

South Korea will not deploy its military to the Middle East in a way that could draw the country directly into the war involving Iran and the United States, President Lee Jae Myung said on Friday, ending recent speculation about whether Seoul could send forces or military assets to the Strait of Hormuz.

Lee’s statement comes after growing pressure from US President Donald Trump for allies to provide greater support for the US military campaign against Iran. South Korea had been reviewing options for contributing to the security of commercial shipping and energy supplies in the strategically important waterway, but the possibility of a deployment had become politically sensitive at home.

“There won’t be deployment that would involve or enter war,” Lee said at a news conference on Friday, making clear that South Korea would not send forces into a role that could make it a participant in the conflict.

The president also said Seoul would not deploy military assets for that purpose. His comments appeared intended to draw a clear distinction between protecting South Korean commercial interests and taking part in military operations connected to the war.

At the same time, Lee indicated that South Korea was considering whether it could make a limited contribution to safeguarding navigation in the region. The Strait of Hormuz is one of the world’s most important energy transit routes, and disruption there could have significant consequences for countries that rely heavily on imported oil and gas.

South Korea is particularly exposed to developments affecting energy shipments because its economy depends substantially on imported crude oil and other energy resources. Lee said Seoul needed to take minimum measures, similar to those taken by other countries, to protect commercial shipping, crude-oil shipments and the safety of South Korean citizens.

The country already maintains a naval presence off the coast of Somalia as part of an international anti-piracy operation. That existing maritime capability could potentially provide a basis for limited efforts focused on protecting shipping rather than participating in combat operations.

The distinction is important because the government in Seoul has faced competing pressures. Washington has sought stronger allied participation in the conflict, while South Korea has domestic concerns about becoming involved in another overseas military confrontation.

Trump has criticised Seoul for what he considers insufficient support for the US war in Iran. The disagreement has added pressure to an already complex relationship between the two allies.

The United States and South Korea maintain a longstanding military alliance, largely centred on deterring North Korea and maintaining security on the Korean Peninsula. The alliance includes substantial US military forces stationed in South Korea and regular joint military exercises.

However, Washington’s demands for greater support outside the Korean Peninsula have created a separate issue for Seoul. South Korean policymakers must consider their obligations to the alliance while also assessing the potential economic, political and security consequences of involvement in the Middle East.

Trump’s administration also scaled back major joint military exercises with South Korea during the summer. The decision unsettled the US ally and contributed to uncertainty over the broader direction of bilateral security cooperation.

The debate over the Strait of Hormuz has been particularly sensitive because of the waterway’s importance to South Korea’s economy. Any prolonged disruption to energy shipments could increase costs for South Korean industries and consumers.

Lee therefore suggested that Seoul would continue to consider measures designed to protect its own economic and security interests, while maintaining a firm boundary against involvement in combat.

The president’s position also comes as Seoul and Washington negotiate a separate issue involving South Korea’s investment commitments in the United States.

South Korea agreed last year to invest $350 billion in US manufacturing as part of a trade arrangement under which Washington reduced tariffs on South Korean imports to 15%. Negotiations over how the investment programme will be implemented have continued, with concerns in Seoul focusing on the commercial viability of the proposed commitments.

Lee said the main obstacle to reaching an agreement was concern about whether parts of the investment package would make economic sense for South Korea.

He acknowledged that there were provisions that Seoul would find difficult to accept, but said the two governments were moving closer to an agreement.

The issue has significant economic implications for South Korea because major investments in US manufacturing could affect corporate finances, domestic investment and the country’s industrial strategy. The government has consequently been seeking arrangements that can meet Washington’s expectations while remaining commercially sustainable for Korean companies.

A parliamentary briefing on the investment plans that had been expected this week was postponed and is now expected to take place next week.

The US-South Korea relationship is also closely connected to developments involving North Korea. Lee said there remained a possibility that Trump could meet North Korean leader Kim Jong-un in the coming months, although he acknowledged that many conditions would need to align before such a meeting could take place.

Lee said Trump wanted dialogue with Kim and that he also supported efforts to create an opportunity for talks between Washington and Pyongyang.

The South Korean government has continued coordinating with the United States on the possibility of renewed diplomacy with North Korea. Any meeting between Trump and Kim, however, would depend on decisions by Pyongyang as well as the wider security environment in the region.

North Korean state media has so far remained largely silent on Trump’s repeated calls for another meeting with Kim. Reports have indicated that Trump has encouraged his advisers to explore the possibility of holding talks with the North Korean leader during the autumn.

The potential summit issue adds another layer to Seoul’s foreign-policy calculations. South Korea must simultaneously manage its military alliance with Washington, relations with North Korea, economic ties with the United States and its exposure to instability in the Middle East.

Lee’s decision to rule out military participation in the Iran war reflects that broader balancing act. While Seoul is prepared to consider measures that protect its shipping, energy supplies and citizens, the president has said that such efforts will not involve entering the conflict.

The distinction could also allow South Korea to maintain cooperation with Washington without committing forces to combat operations. Maritime security assistance focused on commercial shipping would be significantly different from participating in attacks or other military operations against Iran.

For the United States, however, the decision represents a limitation on the extent of South Korean military involvement. Trump has sought greater contributions from allies, particularly as the conflict has placed pressure on energy markets and international shipping.

For Seoul, the immediate priority remains protecting national interests while avoiding an expansion of the country’s military role beyond the Korean Peninsula.

The Strait of Hormuz will remain an important consideration. Any escalation affecting the waterway could threaten oil and gas shipments and increase economic pressure on energy-importing countries. South Korea’s government therefore faces the challenge of preparing for potential disruption without becoming directly involved in hostilities.

Lee’s comments suggest that Seoul intends to maintain that distinction. South Korea can participate in measures designed to protect commercial navigation and its own citizens, he said, but will not send forces into a role that would amount to entering the war.

The position comes at a time when relations between Washington and Seoul are being tested across several fronts. Defence cooperation, trade and investment negotiations, energy security and North Korea policy are all interconnected parts of the alliance.

The coming months will show how the two governments manage those differences while maintaining their broader strategic partnership. For now, Seoul has drawn a clear line around military participation in the Iran conflict while leaving open the possibility of limited maritime measures to protect its commercial and national interests.