War · Analysis

From Seoul to the Sauds to the Strait of Hormuz: A Single War With No Exit in Sight

Drone, interceptor and oil shortages are shaping the realities of theatre convergence from Seoul to Taipei, even as a fragile backchannel opens toward peace.

Police shoved back dozens of protesters outside the US embassy in Seoul on 9th September 2026, chanting: "We cannot send our young people into a sea of death." Seoul had sent a fact-finding team to the Strait of Hormuz days earlier, weighing whether to contribute a P-8 Poseidon patrol aircraft, a naval logistics ship and possibly a navy bomb-disposal team to the American-led presence there. Jung Kyung-jik of the People's Solidarity for Participatory Democracy called it "direct participation in an illegal war." No decision has been made, and roughly half of South Korea's active-duty military is made up of men serving mandatory terms that may end up with them fighting a foreign war. North Koreans who participated on behalf of Russia against Ukraine have been seen to defect when the opportunity arose, although that is an extremely unlikely scenario for their cousins in the south.

Ukraine’s and Iran's wars have not been running in parallel for quite some time now; they are colliding very directly with too much of the rest of the world in its crosshairs. Ukraine sent 228 counter-drone specialists to Qatar, the UAE, Saudi Arabia, Kuwait and Jordan in March 2026, sharing expertise built from three years of shooting down Iranian-designed Shahed drones over its own cities, in exchange for a foothold with Gulf states that might reciprocate with scarce air-defence supplies. Iran's parliament answered within days by declaring Ukraine a legitimate target under its reading of the UN Charter. Ukraine escalated the exchange in July, striking an Iranian commercial vessel in the Caspian Sea and killing a sailor; Iran's foreign ministry called it a "hostile and criminal" act and warned it could "further inflame and expand the Russia-Ukraine war" in its own complaint to the Security Council. Russia has also supplied Iran with battlefield intelligence, and has drawn on Iranian-designed drones against Ukraine for years. Two conflicts in what were, until recently, distant theatres are embroiled to the point that they have begun to exchange fire with each other's enemies and continue to draw in too much of the global human population into their orbit.

Reaching all the way up to the Indian subcontinent, Pakistan, now bound to Saudi Arabia and Turkey under the August 2026 Mecca Joint Defence Agreement's mutual-defence clause, is being forced to weigh airstrikes on Houthi targets in Yemen after Houthi attacks wounded 73 people in Saudi Arabia this month. Its defence minister has warned that "an aggression on one country will be considered an aggression on all three”, although action is not expected to follow.

Britain has stopped short of joining the strikes on Iran: Royal Air Force jets flew defensive patrols over Qatar, Jordan, Iraq and Cyprus, and the United States used their Diego Garcia and RAF Fairford bases. Fewer than 850 Patriot missiles now remain in the American arsenal, a decline of roughly 65% since the Iran war began, and CSIS estimates it would take THAAD manufacturers nearly three decades to rebuild inventories to the levels the Pentagon wants at current production of 96 interceptors a year. US Joint Chiefs Chairman General Dan Caine told Congress in March that doctrine was shifting from "stand-off munitions to stand-in munitions," an admission that the expensive kind are running short. That shortage explains why Russian ballistic missile strikes on Ukraine rose from 61 in April 2026 to 198 in July as Kyiv's own Patriot deliveries fell to a fraction of last year’s levels, and also explains why Ukraine has had to seek new patrons in the Gulf.

US Weapons Depletion in Correlation to Russian Strikes — Indexed to the start of the Iran war, where each series began at 100 — Russian ballistic strikes on Ukraine, 61 to 198 a month: ,198 in July; Russian seaborne crude to China, 1.27 to 1.86 mb/d: ,1.86 mb/d; US Patriot interceptor stockpile: ,under 850 left — Indexed from figures in the text. Patriot stockpile: fewer than 850 missiles remain, a fall of roughly 65%. Russian ballistic missile strikes on Ukraine: 61 in April 2026 against 198 in July, a rise of 225%. Russian seaborne crude to China: a record 1.86 million barrels a day in January 2026, up 46% on the year before. THAAD production runs at 96 interceptors a year, which CSIS estimates would take nearly three decades to rebuild inventories to the level the Pentagon wants.

In the meantime, Russia's seaborne crude exports to China hit a record 1.86 million barrels a day in January 2026, up 46% on the year before, as Beijing manages a domestic slowdown, a property crisis and weak consumer demand that make cheap, secure crude a domestic necessity. India imported a record 2.8 million barrels a day of Russian crude in July 2026, some 55.5% of its total crude imports. India also supplied roughly 60% of the diesel moving through the Bab-el-Mandeb strait toward Europe in August 2026, as Russian supply stayed sanctioned and American shipments fell. A US Senate bill passed this year threatened tariffs of up to 100% on the countries buying the most Russian energy, naming India and China among the five it targets, over purchases that currently stabilise global supply and keep European diesel pumps running.

European drivers paid $4.31 a gallon for regular petrol by June and $5.35 for diesel, the second shock of its kind in under five years, after Russia's 2022 invasion of Ukraine. The Strait of Hormuz normally carries around 20% of world oil supply, and the International Energy Agency (IEA) judged the 2026 disruption the largest supply shock in the oil market's history, with output from affected producers down more than 30%. A coordinated release of 400 million barrels of reserves by the 32 nations in the IEA bought only a stopgap the IEA itself warned could have run dry by August. The European Commission cut its 2026 growth forecast to 1.1% from an autumn projection of 1.4%, cut the eurozone figure to 0.9%, while raising its inflation forecast to 3.1%, reflecting that consumer confidence across the bloc falling to a 40-month low.

With the US participation in both wars no longer in question, since the idea of “proxy war” was treated as an open but unsavoury secret, its being stretched thin has shone a light on multiple lacunae. Chinese coast guard vessels have increased their daily presence in Taiwan's near waters by more than 500% between 2020 and 2025, and incursions into the island's deeper maritime security zone quadrupled over the same period, according to CSIS tracking of the pattern. Taiwan ran its 42nd Han Kuang war game across ten days in August 2026, for the first time rehearsing a scenario in which the PLA has already finished preparing to cross the strait. It included drilling counter-landing operations and convoy escorts for supplies under blockade rather than a single decisive invasion. President Lai Ching-te has since proposed an extra $4.6 billion in defence spending on top of a $40 billion, eight-year arms package announced this year for a new "Taiwan Dome" air-defence system, after setting 2026 spending at 3.3% of GDP against a pledge to reach 5% by 2030 and Washington's own demand for 10%. The haggling has been typical of the Trump administration in both terms, and is likely to create longer-term consequences than shorter term wealth.

Taiwan Navigates Under Pressure — Each pair indexed to its own baseline, so the scale of change is comparable — Coast guard presence: 2020,2025; Deep-zone incursions: 2020,2025; Defence spending: 3.3% GDP,10% GDP — CSIS tracking: Chinese coast guard daily presence in Taiwan's near waters rose more than 500% between 2020 and 2025, and incursions into the deeper maritime security zone quadrupled over the same period. Taipei set 2026 defence spending at 3.3% of GDP against its own pledge of 5% by 2030 and Washington's demand for 10%, the ratio indexed here. President Lai Ching-te has proposed a further $4.6 billion on top of a $40 billion, eight-year package for the "Taiwan Dome" air-defence system.

As Iran retaliated against the US this week by hitting roughly ten ships and striking a US military base in Jordan, paths to peace are also being paved in the other direction. CIA director John Ratcliffe made an unannounced trip to Moscow in late August, floating the idea of a Trump-Putin-Zelensky summit and opening a backchannel Washington had been quiet about for months. Steve Witkoff and Jared Kushner followed within days, meeting Putin for three hours in Moscow before flying to Kyiv, where their meeting was at least as unpleasant as their Russian was likely to have been. Ukrainian journalist Dmytro Gordon confronted them on camera, asking whether they found it “disgusting” to have sat across from Putin. At the Shanghai Cooperation Organisation summit in Bishkek, Indian Prime Minister Narendra Modi told Putin at that the world needed to move from endless war to an end to the war and Putin acquiesced, offering a sliver of hope with, "Thank you very much, Prime Minister. We are moving forward along this path." The call for calm has been steadier from outliers to the conflict such as India, while western interests remain more enmeshed in a clash of egos still.

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