RIYADH — Pakistan deployed approximately 8,000 troops, a squadron of JF-17 fighter aircraft, drone units and a Chinese-origin HQ-9 air defense system to Saudi Arabia in early April under the framework of a bilateral defense pact. The deployment falls under the Saudi-Pakistan Mutual Defense Agreement signed in Riyadh on September 17, 2025 by Crown Prince Mohammed bin Salman and Pakistani Prime Minister Shehbaz Sharif.

Under the mutual defense pact, Pakistan may send as many as 80,000 troops to defend Saudi Arabia. The two governments have said they are committed to defending each other in the face of an attack under the agreement. Pakistan also deployed warships under the security arrangement, though it was not immediately clear if any Pakistani warship had reached Saudi Arabia.

The HQ-9 air defense system was deployed to intercept airstrikes following Iran's persistent drone assaults. In March, smoke billowed from Saudi Aramco's Ras Tanura oil refinery following an Iranian drone strike. The Israeli strike targeting a Hamas delegation in Doha, Qatar unsettled Gulf capitals beyond Qatar. Iran's nuclear infrastructure suffered major setbacks following the June 2025 Israel-Iran conflict and subsequent American strikes on Iranian facilities.

Pakistani Defense Minister Khawaja Asif earlier implied that Saudi Arabia falls under Pakistan's nuclear umbrella. Pakistani troops have periodically served in Saudi Arabia since the 1970s in training, border security and advisory roles, and Pakistani military personnel have maintained long-standing institutional ties with Gulf defense establishments. Riyadh has repeatedly provided economic support to Islamabad during periods of financial difficulty.

Pakistan simultaneously occupies the role of military partner to Saudi Arabia and diplomatic intermediary between Washington and Tehran. It hosted the only direct round of talks between the United States and Iran over the nuclear file and played a role in facilitating the ceasefire between the two countries.

The United States retains an extensive and deeply institutionalized military presence across the Gulf. The Fifth Fleet remains headquartered in Bahrain, Qatar hosts the region's largest American air base, and thousands of U.S. troops remain stationed in Kuwait. Washington maintains strategic access agreements with Oman and the United Arab Emirates. Saudi Arabia continues to depend heavily on American military systems, intelligence cooperation and regional deterrence structures.