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18JUN

Iran fires missiles at US in Kuwait

3 min read
09:57UTC

Iran fired two ballistic missiles at US forces in Kuwait late on 31 May; CENTCOM and Kuwaiti air defences intercepted both, and Kuwait invoked Article 51 of the UN Charter.

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Key takeaway

Iran and the US traded live ballistic-missile fire over Kuwait inside the same day both called a ceasefire.

Iran fired two ballistic missiles at US forces in Kuwait late on Sunday 31 May; CENTCOM (US Central Command) and Kuwaiti air defences intercepted both, with CENTCOM confirming the engagement at 08:26 the next morning 1. Kuwait hosts US forces and opened fire again early on Monday 1 June against incoming drone and missile fire, an advance on the IRGC's Sirik Island strike and the projectiles Kuwait intercepted the same day . Kuwait has invoked Article 51, the UN Charter provision granting a state the right to self-defence against armed attack.

This is a direct exchange between Iran and the United States, distinct in kind from the commercial harassment of shipping in the Gulf. State forces fired ballistic missiles at a state's troops, and that state's air defences answered. The word "ceasefire" and live ballistic-missile intercepts now coexist in the same 24 hours.

Iran and the US kept shooting through a truce they both still invoke. A single missed interception over a Gulf base could pull Washington back into open war while its negotiators still call a deal close. The interception record holding is the only thing keeping the missile track and the diplomatic track from colliding.

Deep Analysis

In plain English

Kuwait is a small Gulf Arab country that hosts US military bases. Iran fired two ballistic missiles, guided weapons that travel through the upper atmosphere before diving at their target, at those US bases on the night of 31 May. Kuwait's own air defence systems, working alongside US forces, shot both missiles down before they hit. Kuwait then had to activate its defences again in the early hours of 1 June as more incoming fire arrived. Kuwait formally invoked Article 51 of the UN Charter, which is the UN rule that gives countries the right to defend themselves when attacked. This is the legal step a country takes when it wants the international community to recognise it is acting in self-defence, not as an aggressor.

Deep Analysis
Root Causes

The IRGC's decision to target Kuwait with ballistic missiles has a specific enabling condition: Kuwait's 1991 Status of Forces Agreement with the United States has never been publicly renegotiated to include an explicit clause about collective response obligations, which means US forces at Ali Al Salem and Ahmed Al Jaber air bases operate on a bilateral arrangement that does not automatically draw in Article 5-style allied commitments.

Kuwait cannot invoke NATO mutual defence; it can only invoke the UN Charter.

The second structural driver is the IRGC's Decentralised Mosaic Defence doctrine (activated 28 February 2026), which devolved ballistic missile launch authority to 31 provincial units. Ceasefire or diplomatic tracks coordinated by the Foreign Ministry do not automatically reach those units, which is why strikes continued even when Araghchi was at the table.

What could happen next?
  • Risk

    If Kuwait absorbs another ballistic missile strike and the US again limits its response to interception without an offensive counter-strike, Iran's provincial IRGC units will calibrate that as a confirmed ceiling of US retaliation risk, likely increasing strike frequency.

  • Precedent

    Kuwait's multiple Article 51 invocations create an accumulating legal record. A future UNSC resolution or coalition response would cite this documented pattern of armed attacks on a UN member state.

Sources:CBS News
Mentions:Iran →Kuwait →CENTCOM (US Central Command) →Islamic Revolutionary Guard Corps (IRGC) →Article 51 →Trita Parsi →Iraq →Saudi Arabia →Quincy Institute for Responsible Statecraft →IISS →Gulf War →UN Charter →Washington →United States →Sirik →
First Reported In

Update #115 · Iran moves first, Trump moves by phone

CBS News· 2 Jun 2026
Read original →
Causes and effects
Caused by
IRGC hits Sirik base, vows sharper reply
Iran's Sirik Island air base strike and initial projectile intercepts by Kuwait on 1 June preceded the two-ballistic-missile engagement on 31 May that CENTCOM confirmed the following morning.
Occurred 1 Jun 2026
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Kuwait invokes Article 51 after strike
Iran's Ali Al Salem strike and Kuwait's initial Article 51 invocation on 28 May set the pattern of direct missile exchanges that the 31 May ballistic missile attack continues.
Occurred 28 May 2026
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IRGC salvo hits two Gulf states at once
Two-country salvo escalates beyond the 31 May two-missile single-state attack on Kuwait (ID:3819)
Occurred 5 Jun 2026
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This Event
Iran fires missiles at US in Kuwait
A direct state-on-state missile exchange ran inside the same 24 hours as the word ceasefire, leaving one missed interception as the trigger that could reopen open war.
Led to
Iran drone hits Kuwait airport terminal
Iran's two ballistic missile strikes on US forces in Kuwait on 31 May preceded and escalated to the Shahed-136 drone strike on Kuwait International Airport Terminal 1 on 3 June.
Occurred 3 Jun 2026
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