Pact of deterrence, engine of war: Pakistan and Türkiye activate Saudi mutual-defence deal

On October 5, the Strategic Political and Defence Committee of the Makkah Alliance for Defence met in emergency session in Riyadh, and three countries did something none of them had done before: they invoked a mutual-defence pact. Pakistan, Saudi Arabia and Türkiye agreed to "move immediately to the practical implementation of the collective defence commitments" of the trilateral accord they signed on August 7 — rapidly deploying agreed military forces and capabilities to Saudi Arabia. It is the first time the pact, which treats an armed attack on any one member as an attack on all three, has been activated. The trigger is a war that keeps widening. Houthi forces have escalated missile and drone attacks on Saudi territory, and their military spokesman Yahya Saree claimed three operations targeting King Khalid International Airport in Riyadh, an Aramco refinery in Rabigh, and the Khamees al-Mashait airbase — "a large number of ballistic missiles, cruise missiles and unmanned aerial vehicles," he said, framed as retaliation for what he described as 60 Saudi airstrikes in 24 hours. Saudi authorities have said they intercepted six ballistic missiles. Saree's claims are unconfirmed by Riyadh and should be read as claims. Islamabad is working hard to keep its fingerprints defensive. Pakistan's Foreign Ministry described the accord as intended to strengthen collective deterrence "rather than target a particular country," and Defence Minister Khawaja Asif had warned in early September that any unprovoked aggression or Yemen spillover into Saudi Arabia would set the pact in motion. Saudi Defence Minister Prince Khalid bin Salman said members agreed to activate "collective deterrence measures" in response to the attacks, declaring the three countries "unequivocally" opposed to attacks targeting Saudi Arabia and Islamic holy sites. A retired Pakistani general, Lt Gen Nauman Mahmood, was appointed the alliance's first secretary-general for a three-year term. What is striking is how reluctantly this pact was born. The alliance was forged in the shadow of the US-Israeli war on Iran earlier this year, and its activation had been deliberately delayed: both Türkiye and Pakistan wanted to preserve their roles as diplomatic mediators in the wider regional war. That they have now dropped the mediator's pose and moved forces into the kingdom signals that the escalation has outrun the diplomacy. Coinciding with the Riyadh decision, Saudi-backed Yemeni government forces launched a major counteroffensive — the "Dawn of Yemen" operation — around the Bab el-Mandeb Strait, reportedly recapturing the port city of Mokha from the Iran-aligned Houthis. Strip away the diplomatic grammar and the picture is bleak. A defensive pact whose members insisted it targeted no one has, at its first invocation, become an engine of a widening war: three armies formally aligning against an armed movement whose war began with a Saudi-led bombing campaign that has killed tens of thousands of Yemeni civilians. Deterrence, in this telling, is a word governments use when they are done pretending peace is on the table. The question now is not whether the pact holds, but how many fronts it will be asked to cover.