Saudi Arabia's strike on Sana'a International Airport, followed by Houthi missile attacks on two Saudi airports, has opened a dangerous new phase in the Iran conflict. The immediate question is whether Riyadh has finally abandoned the strategic restraint it has maintained for months and is now preparing for direct confrontation with Iran. If that happens, Pakistan's obligations under the Strategic Mutual Defence Agreement will inevitably come under discussion.

The latest escalation should not be viewed in isolation. Reports suggest that an Iranian aircraft landed at Sana'a before the Saudi strike, reinforcing long-standing Saudi concerns that Yemen continues to be used to facilitate Iranian support for the Houthis. Yemen's internationally recognised government also condemned the reported use of Sana'a airport for activities benefiting the Houthis, arguing that civilian infrastructure was being exploited for military purposes. Riyadh's response was directed at that immediate threat. The subsequent Houthi attacks marked Tehran's decision to activate its most capable remaining regional proxy against Saudi Arabia.

The timing deserves attention. The Houthis have possessed missiles and drones capable of striking Saudi territory for years. Their military capability is not new. What has changed is Tehran's decision to employ them more aggressively after months of relative restraint. The decision also reflects the clerical establishment’s assessment that widening the conflict now offers its best remaining opportunity to alter a strategic trajectory that has increasingly turned against the IRGC across multiple theatres. In effect, Iran appears to be playing one of its last remaining strategic cards.

Pressure on the Iran regime is intensifying with every passing day. First, following renewed Iranian attacks on commercial shipping, Washington has shifted its military focus towards southern Iran and the Strait of Hormuz. President Trump has reinstated the U.S. naval blockade on Iranian shipping while declaring that Hormuz will remain open for international commerce, signalling that Washington is determined to deny Iran the ability to use the Strait as a strategic weapon. Britain's decision to proscribe the IRGC as a terrorist organisation further reflects a broader Western effort to isolate the organisation politically, financially and militarily.

Second, Iran's attempt to use Hormuz as leverage has produced the opposite effect. Rather than deterring its adversaries,........

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