Multilateral, Joint Forces execute sinking exercise during Valiant Shield 2026

Photo By Seaman Apprentice Anthony Vilardi | Japan Maritime Self-Defense Force submarine fires a torpedo at the decommissioned USS Juneau in support of a live-fire sinking exercise (SINKEX) as part of Valiant Shield 2026 while underway in the Philippine Sea, June 27, 2026. The exercise targeted the former amphibious transport dock (LPD) ship USS Juneau – which saw action in the Vietnam War and Operation Desert Storm before decommissioning in 2008 - more than 200 nautical miles off the coast of Guam, and brought together air, surface, and subsurface assets in coordinated strikes, allowing crews to sharpen critical skills in weapons employment and target engagement under realistic conditions that no simulator can fully replicate. Valiant Shield is a biennial, multilateral field training exercise conducted by the U.S. Armed Forces and partner nations in the Western Pacific focusing on joint, cross-combatant integration operating seamlessly across sea, air, land, and cyberspace. Exercises like VALIANT SHIELD allow Pacific Command Joint Forces the opportunity to integrate forces from all branches of service and with our allies to conduct precise, lethal, and overwhelming multi-axis, multi-domain effects that demonstrate the strength and versatility of the joint force and our commitment to a free and open Indo-Pacific. (U.S. Navy photo by Mass Communication Specialist Seaman Anthony Vilardi)  

PHILIPPINE SEA

06.26.2026

Courtesy Story

USS GEORGE WASHINGTON (CVN 73)

From Task Force 70 Public Affairs

PEARL HARBOR, Hawaii – U.S. Pacific Command joint forces, along with allied and partner forces, successfully carried out a live-fire sinking exercise (SINKEX) as part of Valiant Shield 2026 (VS26), targeting the thoroughly cleaned and decommissioned Austin-class amphibious transport dock USS Juneau (LPD 10) more than 200 nautical miles off the coast in the Mariana Islands Range Complex.

The evolution brought together air, surface, and subsurface assets in coordinated strikes, allowing crews to sharpen critical skills in weapons employment and target engagement under realistic conditions that no simulator can fully replicate.

All operations adhered strictly to federal environmental regulations and international standards. Prior to the exercise, the target vessel underwent extensive preparation, including the complete removal of hazardous materials such as PCBs, petroleum residues, and other pollutants in line with Environmental Protection Agency guidelines. The selected site was carefully surveyed to ensure the safety of marine life, vessels, and personnel, with full compliance to the National Environmental Policy Act, Marine Mammal Protection Act, and other key statutes.

“This SINKEX provided an outstanding opportunity for our joint team to integrate capabilities across domains, honing the lethal precision and coordination essential for high-end maritime operations in the Pacific theater,” said Rear Adm. Eric Anduze, commander of Carrier Strike Group 5 and Task Force 70.

Valiant Shield is a multinational, biennial field training exercise focused on integrating interoperability training in a multi-domain environment. It emphasizes realistic training in detecting, tracking, and engaging threats across sea, air, land, space, and cyberspace domains to enhance overall combined and joint force readiness.

Media queries regarding VS26 should be directed to the VS26 Combined Joint Information Bureau at mailto:[e-mail]. Imagery and stories regarding Valiant Shield can be found here: https://www.dvidshub.net/feature/ValiantShield.

• Date Taken: 06.26.2026
• Date Posted: 06.28.2026 01:29
• Story ID: 568861
• Location: PHILIPPINE SEA