Saudi Arabia, Turkey and Pakistan signed a joint defense agreement in Mecca on August 7, 2026, and analysts now examine the implications if Iran, Egypt or Bangladesh were to join the pact. Such expansion would bridge the historic Sunni-Shia divide and create a nuclear-armed Muslim-majority military bloc spanning the Middle East and South Asia, reshaping regional alliances around Israel's borders. A unified defense structure of this scale would mark a significant realignment of regional power ahead of any future confrontation involving Israel and its neighbours.