Fact-checked version — 16 August 2026 President Donald Trump said on 16 August that he had instructed the Pentagon to substantially reduce U.S.–South Korean military exercises. He cited the cost of the exercises and South Korea's refusal to participate in U.S. actions against Iran. The annual Ulchi Freedom Shield (UFS) exercise is scheduled for 17–27 August 2026. Approximately 18,000 South Korean troops are participating. South Korea's Joint Chiefs of Staff stated that the exercises began as scheduled. The exact reductions resulting from Trump's order were not immediately specified. UFS includes training involving drones, GPS disruption, cyber operations and other military scenarios. The exercises have increasingly emphasized computer simulations rather than large-scale live-fire training. Approximately 28,500 U.S. military personnel are stationed in South Korea. Trump cited his relationship with North Korean leader Kim Jong Un when discussing the exercises. Trump and Kim held three summits during Trump's first presidency, but those negotiations did not result in North Korea ending its nuclear-weapons or ballistic-missile programs. North Korea has continued ballistic-missile testing. Reuters reported launches on 6 and 11 August, with the 11 August missile traveling approximately 700 km before falling into the Sea of Japan. North Korea's Foreign Ministry publicly condemned the planned U.S.–South Korean exercises and described them as threatening. North Korean forces have fought alongside Russia in the war in Ukraine. U.S. military officials have said those forces have gained battlefield experience involving unmanned systems, electronic warfare and cyber operations. Trump specifically linked his complaint about South Korea to its refusal to participate in U.S. efforts concerning Iran's nuclear program and the ongoing U.S.–Iran conflict. That connection comes directly from Trump's public statement; it is not evidence that South Korea is obligated under its alliance treaty to participate in U.S. military operations against Iran. The U.S.–South Korean alliance remains in place. Trump's announcement concerns the scale of military exercises, not termination of the defense treaty or withdrawal of U.S. forces from South Korea. South Korea previously proposed talks with North Korea concerning formally ending the Korean War. The 1953 Korean Armistice Agreement ended active hostilities but did not constitute a formal peace treaty. Trump previously suspended or reduced U.S.–South Korean exercises during his first presidency, including during the 2018 diplomatic period with Kim Jong Un. Important corrections to the BBC wording 1. "Scale back" is accurate; "cancel" is not. Trump said the exercises should be substantially reduced, while acknowledging it was too late to cancel the scheduled exercise completely. 2. The exercise was not cancelled. UFS proceeded on its scheduled start date, 17 August. 3. The 18,000 figure refers to South Korean personnel, not total U.S. and South Korean forces. 4. Trump's Iran explanation is his stated justification, not an independently established causal explanation. The factual statement is that he cited South Korea's refusal to participate in U.S. actions concerning Iran. 5. The BBC's statements about Trump's intentions toward Kim—such as suggesting the move "raises hope" for renewed negotiations—are analysis, not established facts. They should be removed from a strictly factual report. 6. The BBC's characterization that Trump's decision represents a "mixed message" for Seoul is also analysis and should be removed. 7. Statements about what Trump's move "may" mean diplomatically should likewise be excluded unless explicitly identified as analysis or attributed to a named source. Factual bottom line The verified event is that Trump ordered the Pentagon on 16 August 2026 to substantially reduce U.S.–South Korean military exercises. UFS remained scheduled and began on 17 August, with approximately 18,000 South Korean troops participating. Trump cited exercise costs, South Korea's refusal to participate in U.S. actions against Iran, and his relationship with Kim Jong Un. South Korea did not cancel the exercise, and there is no evidence in the available reporting that the U.S.–South Korean defense alliance itself has been terminated or that U.S. forces are being withdrawn.