What Happened to USS Juneau (LPD-10) Valiant Shield SINKEX?
The USS Juneau (LPD-10), an Austin-class amphibious transport dock, was sunk as a target during a live-fire Sinking Exercise (SINKEX) on June 27, 2026, as part of Exercise Valiant Shield 2026. Decommissioned in 2008, the vessel served as a realistic target for multinational forces to hone their combat skills in the Pacific Ocean.
Quick Answer
The USS Juneau (LPD-10) was sunk on June 27, 2026, during Exercise Valiant Shield 2026, a multinational live-fire SINKEX. The decommissioned amphibious transport dock, which had been in the National Defense Reserve Fleet since its decommissioning in 2008, was targeted by air, surface, and subsurface assets, including a torpedo from a Japan Maritime Self-Defense Force submarine. This exercise, conducted more than 200 nautical miles off the coast of Guam, aimed to enhance the joint forces' ability to detect, track, and engage maritime threats.
📊Key Facts
📅Complete Timeline13 events
Keel Laid Down
The keel for USS Juneau (LPD-10) was laid down by Lockheed Shipbuilding and Construction Company in Seattle, Washington.
Launched
USS Juneau was launched, sponsored by Mrs. William A. Egan, wife of the Governor of Alaska.
Commissioned into U.S. Navy
The USS Juneau (LPD-10) was officially commissioned into service with the United States Navy.
Vietnam War Deployments
Juneau completed five deployments to the western Pacific, including eight trips into Vietnamese waters, earning five battle stars.
Exxon Valdez Oil Spill Response
Juneau was the first naval vessel on station after the Exxon Valdez oil spill, providing logistical support and serving as a command and control ship.
Operation Desert Storm Participation
Juneau joined Amphibious Group Three in Operation Desert Storm, transporting troops and equipment to the Persian Gulf.
Operation Sea Angel in Bangladesh
Juneau proceeded to Bangladesh to assist in Operation Sea Angel, providing relief after a disastrous cyclone.
Operation Restore Hope in Somalia
The 15th Marine Expeditionary Unit (MEU) performed an unopposed amphibious assault into Mogadishu from Juneau, USS Tripoli, and USS Rushmore.
Myanmar Cyclone Nargis Aid Mission
Juneau stood by off Burma as part of the USS Essex amphibious group, waiting to provide aid after Cyclone Nargis.
Decommissioned
USS Juneau was officially decommissioned at Naval Base San Diego after 39 years of active service.
Moved to National Defense Reserve Fleet
Following decommissioning, Juneau was moved to Pearl Harbor, Hawaii, and placed in the National Defense Reserve Fleet.
Valiant Shield 2026 Exercise Begins
Exercise Valiant Shield 2026, a biennial multinational field training exercise, commenced in the Pacific.
Sunk in Valiant Shield SINKEX
The USS Juneau (LPD-10) was sunk as a target during a live-fire SINKEX by multinational forces, including a torpedo from a Japan Maritime Self-Defense Force submarine.
🔍Deep Dive Analysis
The USS Juneau (LPD-10), an Austin-class amphibious transport dock with a distinguished service history, met its final fate on June 27, 2026, during a live-fire Sinking Exercise (SINKEX) as part of the biennial Exercise Valiant Shield 2026. The vessel, named for the capital of Alaska, was commissioned on July 12, 1969, and served for nearly four decades, participating in significant operations such as the Vietnam War, Operation Desert Storm, and humanitarian efforts like Operation Sea Angel in Bangladesh and Operation Restore Hope in Somalia.
After its extensive service, the USS Juneau was decommissioned on October 31, 2008, and subsequently placed in the National Defense Reserve Fleet at Pearl Harbor, Hawaii. For years, it remained in inactive status, awaiting final disposal. The decision to use the Juneau for a SINKEX was part of a broader strategy by the U.S. Navy and its allies to provide realistic training scenarios that cannot be replicated in simulations.
The SINKEX, conducted more than 200 nautical miles off the coast of Guam in the Mariana Islands Range Complex, involved a multinational contingent including forces from the U.S., Japan, Australia, Canada, and New Zealand. The exercise brought together air, surface, and subsurface assets in coordinated strikes. The USS Juneau sustained heavy damage from various weapons, including an AGM-84D Harpoon missile fired by a Navy P-8A Poseidon and a Long Range Anti-Ship Missile (LRASM) launched by a B-2 Spirit bomber. The final blow was delivered by a torpedo from a Japan Maritime Self-Defense Force submarine.
The primary purpose of sinking the USS Juneau was to enhance the joint team's ability to integrate capabilities across domains, honing lethal precision and coordination essential for high-end maritime operations in the Pacific theater. Rear Adm. Eric Anduze, commander of Carrier Strike Group 5 and Task Force 70, emphasized that the SINKEX provided an outstanding opportunity for forces to sharpen critical skills in weapons employment and target engagement under realistic conditions. Prior to its sinking, the vessel underwent a rigorous cleaning process to remove all hazardous materials, including PCBs and petroleum residues, in strict compliance with federal environmental regulations and international standards, ensuring minimal environmental impact.
As of June 30, 2026, the USS Juneau (LPD-10) rests on the ocean floor, serving as an artificial reef and a testament to its long and impactful service. Its sinking during Valiant Shield 2026 marks a significant event in the ongoing efforts to maintain and improve interoperability and combat readiness among allied forces in the Indo-Pacific region.
What If...?
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