The Mecca Joint Defence Agreement, signed August 7, 2026, by Saudi Arabia, Turkey, and Pakistan, established a collective security framework modeled partly on NATO Article 5, committing members to treat an armed attack on one as an attack on all while promoting military cooperation, intelligence sharing, and joint exercises. Signatories have repeatedly described the pact as open to expansion, with Turkish officials and Pakistani statements citing interest from multiple Muslim-majority states. Recent activation amid Houthi strikes on Saudi infrastructure led to emergency coordination in October 2026, including planned force deployments and a Pakistani-led secretariat in Riyadh. Egypt publicly signaled readiness to join in mid-October, while Qatar, Iraq, Syria, and others have been floated in diplomatic commentary. Formal accession requires internal approvals and alignment on triggers, leaving trader assessments focused on whether any candidate completes the process before the market deadline amid ongoing regional security pressures.