A drone struck a Kuwaiti oil refinery overnight, marking the first confirmed attack on a Gulf Cooperation Council state since the US-Israeli war on Iran began 35 days ago. Kuwait has not been a party to the conflict. It did not authorize the use of its territory or airspace. It simply had the misfortune of being located in the neighborhood.

Kuwait’s government issued a statement condemning the attack without identifying who launched the drone. The geography makes attribution complicated — Iran, Iraqi militias, and Houthi forces all have the capability and the proximity.

What is not complicated is the implication. The war is spreading. The assurances from Washington that this would be a contained, targeted campaign are colliding with a reality that anyone who has studied the region could have predicted: wars in the Middle East do not stay contained.

Oil prices surged immediately. Brent crude pushed past $135. For African and Asian nations already struggling with fuel costs from the Strait of Hormuz disruption, this is another blow to economies that were already buckling.

Kuwait is a country of 4.3 million people. Its oil infrastructure is the backbone of its economy. A single drone has now demonstrated that the infrastructure is vulnerable — and that vulnerability extends to every Gulf state with a refinery, a port, or a desalination plant.

The question is not whether more attacks will follow. The question is which country is next.