President Donald Trump’s decision to scale back annual military exercises with South Korea is raising concerns that the decades-old security alliance between Washington and Seoul is increasingly being reshaped around economic interests.
The move came as South Korea finalises hundreds of billions of dollars in investment commitments to the United States, highlighting growing tensions between Washington’s security expectations and Seoul’s economic obligations.
Trump said on August 16 that he had instructed the Pentagon to reduce the military drills because they were “costly” and sent “inappropriate and hostile” signals to North Korea.
The announcement coincided with South Korean Trade Minister Kim Jung-kwan’s visit to Washington, where he held talks on investment commitments and tariffs with US Commerce Secretary Howard Lutnick.
Experts said the decision could signal a fundamental shift in the relationship, from one primarily centred on military cooperation to one increasingly driven by trade, investment and industrial integration.
Darcie Draudt-Véjares, a fellow at the Carnegie Endowment for International Peace, said doubts remained over whether South Korea’s investment commitments would guarantee continued US security support.
She was referring to the $350 billion investment package South Korea agreed to make in the US in exchange for lower reciprocal tariffs.
“Looked at a different way, we could see a shift from a relationship centered around a military alliance to one centered around integrated industrial ecosystems,” Draudt-Véjares said.
That, she added, places “economics rather than security as the basis of the US-South Korea partnership.”
Trump’s decision was reportedly partly driven by South Korea’s slower pace in deploying its promised investments compared with Japan, according to Politico, citing people familiar with the matter.
The US president had also cancelled the annual exercises in 2018 following his historic meeting with North Korean leader Kim Jong Un in Singapore.
The Ulchi Freedom Shield exercise, which traces its origins to 1954, involved about 18,000 South Korean troops and an undisclosed number of US personnel this year.
Experts have warned against assuming that increased South Korean defence spending or deeper economic ties will guarantee continued US military commitments in Asia.
Jennifer Kavanagh, senior fellow and director of military analysis at Defense Priorities, said economic cooperation could continue even if the US reduces its military presence in the region.
“Semiconductor trade or cooperation on shipbuilding can continue, separate from the US military presence in Asia,” she said.
Kavanagh added that a smaller US military footprint and narrower security commitments in Asia could free American economic resources for investment at home and elsewhere.
Economic ties between the two countries have deepened significantly, particularly as South Korean semiconductor companies have become increasingly important to the global artificial intelligence industry.
South Korean companies are also benefiting from Trump’s push to reindustrialise the US and strengthen American competitiveness with China.
Korean firms have expanded investments in semiconductors, electric vehicles and shipbuilding in the US.
SK Hynix, for instance, is building a $4 billion advanced packaging facility in Indiana and plans to invest $10 billion in new product lines and support for its US operations.
However, not all analysts believe reducing the US military footprint in Asia serves Washington’s strategic interests.
Bruce Klingner, a former senior Central Intelligence Agency officer in the Koreas, said cutting the military exercises could further deepen concerns among US allies about Washington’s reliability as both a security and economic partner.
He also argued that Trump could be seeking to shift American voters’ attention away from the Iran war ahead of the November midterm elections.
The scaled-back exercises have also failed to ease tensions with North Korea.
Pyongyang launched more than 10 short-range ballistic missiles towards the East Sea on Thursday, according to South Korea’s Defence Ministry.
Richard Haass, president emeritus of the Council on Foreign Relations, said Trump’s decision weakened US credibility and leverage in dealing with North Korea.
He warned that the greater danger was that South Korea could eventually pursue its own nuclear weapons programme in response to uncertainty over the US security commitment.
“That would be incomparably worse because it would ultimately bring in China and potentially Japan,” Haass said, describing the situation as “a fiasco.”
The US Commerce Department and South Korea’s Trade Ministry did not respond to requests for comment.
Boluwatife Enome
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