South Korea’s Strategic Bind During the American-Iranian War

South Korea, a major ally of the United States, is one of the countries facing the spillover of the 2026 American-Iranian War. Alongside much of the world, Seoul faces a potential energy crisis with the volatility of the Strait of Hormuz.

Furthermore, the partial redeployment of air defense assets has left Seoul vulnerable if Pyongyang were to conduct hybrid provocations. While South Korea has enjoyed growing relations with Middle Eastern states, the government could find itself in a bind if a rising energy crisis were to exacerbate stagnant economic conditions in a country that is losing trust in American security guarantees.

South Korea’s Energy Situation

During the 2026 Iran War, the Islamic Republic’s military capabilities suffered major setbacks from American and Israeli air power. However, Tehran has relied on economic warfare, which is strangling the global economy in trade, energy, and fertilizer.

Liquid Natural Gas (LNG) imports are a major factor in Seoul’s economy, which has taken a hit from the war. Over 14% of South Korea’s LNG imports come from Qatar, which has been frequently targeted during the war. A further 70% of crude oil also comes from the Middle East.

Seoul’s index is also affected after it lost 12% of its value on March 4th but later stabilized. Though the index rebounded, the war exacerbated South Korea’s vulnerability to energy dependence, which other close regional partners such as Japan and the Philippines also suffer from.

Seoul’s Weapons Exports During the War

As aforementioned, South Korea keeps close relations with the Middle East—particularly in the defense sector with countries such as Saudi Arabia, Qatar, and the UAE. Over the past several years, South Korea has exported billions in weapons systems to these countries, which are using Seoul’s systems in the war today.

During the ongoing war, the Cheongung-II missile defense system, produced by South Korea, experienced major combat in the UAE with a 90% interception rate. Abu Dhabi was the first to purchase the system from Seoul as part of the country’s upgraded layered defense to prepare for a conflict with Tehran.

On Tuesday, March 10th, 2026, Abu Dhabi made further requests to Seoul for additional interceptors for the Cheongung-II missile defense system, which Seoul expedited. With the Cheongung-II showing reliability under combat, other countries with close relations to the Republic of Korea, such as Qatar, Kuwait, Egypt, and Saudi Arabia, could also become future customers.

Redeployment of Resources from U.S. Forces Korea and Pressure from Washington

Amid constant Iranian missile attacks against the Gulf states, Israel, and U.S. military bases, on March 10th, the Pentagon began moving some of the Terminal High Altitude Area Defense (THAAD) batteries from South Korea to the Middle East.

The redeployment of some of the THAAD batteries comes as a shock to South Koreans, as Seoul was engaged in a major diplomatic standoff with Beijing over hosting the air defense system, which then President Obama deployed. South Korean President Lee Jae-myung reaffirmed to his cabinet that the deployment of military assets by U.S. Forces Korea (USFK) would not affect readiness or deterrence against North Korea.

Nevertheless, North Korea has tested gaps in America’s defense assets with at least ten ballistic missile launches that fell into the Sea of Japan on March 14th. What made the launches different from prior ones was that Pyongyang usually fires approximately one to three ballistic missiles and rarely fires ten. The last time North Korea fired ten missiles in one day was in May 2024.

Another potential flashpoint the Republic of Korea could find itself in is the ongoing closure of the Strait of Hormuz, as the Trump Administration has admonished allies for not helping to reopen it. South Korea was named among the countries President Trump wants to contribute to, and this could put the Lee administration in a bind.

Lee Jae-myung has previously gained praise from the Trump administration for efforts towards revitalizing the American shipbuilding industry and could come under diplomatic pressure to support U.S. and Israeli efforts in the war. However, any support could come with domestic pushback as Lee’s party was able to ascend against the backdrop of former President Yoon’s more interventionist foreign policy.

Overall Situation

South Korea’s situation during the 2026 Iran War will be a wake-up call for the Republic. Not only is Seoul facing repercussions from the global energy crisis, but it is also learning lessons about the overextension of its top ally, the need for more production in the defense industry, and contingencies if an emergency scenario reaches the Indo-Pacific.

Seoul is heavily reliant on energy imports, and in a potential wartime scenario, such as a Taiwan contingency or South China Sea conflict, China’s navy (PLAN) could potentially blockade shipping lanes in the region to have leverage over American-led forces. Seoul will need to find methods of more energy reserves if an energy crisis were to hit the Indo-Pacific.

Furthermore, despite contributing heavily to combat in Vietnam and acting in support roles in Iraq and Afghanistan, South Korea knows it could come under pressure from an unconventional American administration akin to Donald Trump in the future. Because of this, Seoul will need to strengthen its conventional capabilities if America becomes overstretched again outside the Korean Peninsula. Investing in cheap anti-drone countermeasures and more layered air defenses will be needed to protect the Republic, as North Korea could replicate Iran’s strategy of overwhelming air defense systems.

Finally, South Korea’s defense exports, now combat-tested in the Middle East, can continue to benefit positively with other major partners such as NATO countries if Seoul lifts its export ban for the Prioritized Ukraine Requirements List (PURL). With the Lee administration exploring a potential rapprochement with Europe over Russia’s threats, Seoul could find enhanced relations with Western countries that could help backfill security gaps in the Indo-Pacific if the U.S. becomes overstretched in a prolonged Middle Eastern conflict.

South Korea must learn and adapt from the 2026 Middle East crisis in energy reserves, production increases, investments in layered air defense, and countermeasures if a blockade akin to the closure of the Strait of Hormuz and fractures within alliance systems were to occur in the Indo-Pacific.