Balikatan 2026 Day 7: Integrated Air and Missile Defense Phase Launches at Naval Station Leovigildo Gantioqui, Zambales — Four-Day IAMD Drills Begin April 26–29

A major new exercise phase — Integrated Air and Missile Defense (IAMD) drills — launched on April 26, 2026 at Naval Station Leovigildo Gantioqui (NSLG) in San Antonio, Zambales. The phase runs through April 29 and is designed to link heterogeneous radar systems, command and control networks, and missile defense batteries across participating nations to detect, track, and neutralize simulated aerial and ballistic missile threats. The drills represent the most directly relevant exercise capability against China's DF-26 and DF-21D anti-ship ballistic missiles, which threaten US naval forces and Philippine bases throughout the South China Sea theater. Integration of US Patriot PAC-3 air defense systems, US Marine Corps MADIS platforms, and Philippine Air Force radar and command networks is tested for cross-domain interoperability under joint operational conditions. The NSLG location on the Luzon western seaboard — facing the South China Sea and the primary Chinese maritime axis of approach — makes it strategically significant as a command hub for any IAMD scenario involving PLAN or PLARF operations. The Garden Island (Hawaii) reported that approximately 1,300 Marines and sailors from the 3rd Marine Littoral Regiment (Kaneohe Bay) and 25th Infantry Division (Schofield Barracks) form the core US contribution to the IAMD and allied exercise phases. The IAMD launch underscores how Balikatan 2026 has expanded beyond traditional ground combat scenarios to encompass the full multi-domain spectrum — space, cyber, air defense, and sea control — in direct response to China's multi-axis counter-posture around the Philippine archipelago.