The Mecca Joint Defence Agreement (or "Mecca Pact"), signed on 7 August 2026, is a collective-security pact uniting Pakistan, Saudi Arabia, and Turkey. Building on the earlier Pakistan-Saudi Strategic Mutual Defence Agreement of September 2025, it was formalized during the 2026 Iran war as Saudi Arabia and the recognized Yemeni government faced renewed Houthi attacks. Its central clause declares that an armed attack on any one member is an attack on all, though analysts stress it likely does not extend Pakistan's nuclear deterrent to its partners, especially since Turkey already hosts US nuclear weapons as a NATO member. The agreement cements decades of military cooperation, reflecting Pakistan's mid-2026 deployment of troops and aircraft to Saudi Arabia and Saudi Arabia's 2023 purchase of Turkish drones. Signed in Mecca by Prime Minister Shehbaz Sharif, President Recep Tayyip Erdoğan, and Crown Prince Mohammed bin Salman, the pact aims to strengthen collective security and promote regional stability.