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Fact-check: Recent X posts from credible accounts like Asia Times, WSJ's Jonathan Cheng, Newsweek, and defense analysts discuss Rear Adm. Mike Brookes' testimony to the US-China Economic and Security Review Commission on China's undersea warfare advancements, including the 'undersea Great Wall' sensor system, directly supporting the article's claims. Multiple outlets like WSJ and Epoch Times report consistently on the hearing and China's submarine buildup without contradictions. The story aligns with real-time reporting on the official USCC hearing held around March 2, 2026.

China’s undersea Great Wall targets US sub supremacy

chinaunited-statespacificundersea-warfaresubmarinesnuclear-deterrentindo-pacificus-china-rivalry

China is developing a layered undersea warfare system in the Pacific aimed at countering US submarine dominance and securing its nuclear deterrent. Rear Admiral Mike Brookes testified before the US-China Economic and Security Review Commission that Beijing views undersea warfare as a strategic priority. The system, described as an undersea 'Great Wall,' is designed to reshape the regional strategic balance and challenge longstanding US naval supremacy in the Indo-Pacific.

China’s undersea Great Wall targets US sub supremacy

[Sources]

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