US Deploys 'Cognitive Warfare' Against China in South China Sea

We are so untroubled by your presence that our commanders can sit like this.
The casual posture in the USS Mustin photograph was read as a deliberate message of American confidence to China.

In the contested waters of the South China Sea, a single photograph of a relaxed American naval commander watching a Chinese carrier pass became a deliberate act of communication — not a provocation, but a performance of calm. The United States and the Philippines, bound by treaty and now by renewed military exercises, are quietly reasserting a partnership that had drifted under the weight of Duterte's ambivalence. What unfolds here is not merely a territorial dispute but a contest over perception itself — who fears whom, and who gets to decide.

  • A photograph of US Navy commanders lounging as China's premier aircraft carrier passes within kilometers was released not as documentation, but as a message: America is unbothered.
  • Hundreds of Chinese vessels anchored at Whitsun Reef inside Philippine-claimed waters, refusing to leave, have pushed regional tensions to a new threshold.
  • The US and Philippines are resuming joint Balikatan military exercises — scaled down but symbolically charged — just as the standoff at the reef reaches a diplomatic impasse.
  • US Defense Secretary Austin proposed deeper intelligence-sharing on South China Sea threats, while the State Department invoked the Mutual Defense Treaty as a direct warning to Beijing.
  • Duterte's suspended plan to terminate the Visiting Forces Agreement still looms, reminding all parties that the Philippine-US alliance is a negotiation, not a given.

On April 4th, the US Navy released a photograph that spoke without words: two commanders aboard the guided-missile destroyer USS Mustin, feet up, casually watching China's Liaoning carrier pass at close range. Analysts called it cognitive warfare — a staged display of American composure designed to signal that Washington does not regard China's military as an immediate threat. The relaxed posture, the proximity, the decision to publish it all were deliberate choices, not accidents of routine.

The image arrived amid a broader escalation. Days earlier, hundreds of Chinese vessels had gathered at Whitsun Reef in the disputed Spratly Islands, within waters the Philippines claims as its exclusive economic zone. China called them fishing boats sheltering from weather. Manila called it an incursion and demanded withdrawal. Beijing refused.

On the same day the photograph circulated, the Armed Forces of the Philippines announced the resumption of Balikatan joint exercises with the United States — the first since the pandemic suspended them in 2020. The drills would be smaller than usual, roughly a quarter of normal attendance, blending virtual and in-person components. Military leaders described it as a way to keep the alliance alive rather than a dramatic show of force.

The diplomatic backdrop was equally pointed. US Defense Secretary Austin spoke with his Philippine counterpart about the Whitsun Reef standoff and proposed enhanced cooperation on monitoring Chinese activity in the sea. The State Department went further, explicitly invoking the Mutual Defense Treaty — a reminder that an armed attack on Philippine forces anywhere in the South China Sea would obligate an American response.

Yet the alliance remains complicated. President Duterte had spent years tilting toward Beijing and away from Washington, and his since-suspended plan to terminate the Visiting Forces Agreement still casts a shadow. The Philippines is not a simple ally but a nation navigating between two powers, and the resumption of Balikatan was less a return to old certainties than a careful, conditional signal — openness to American partnership, for now, while the larger contest over perception and power continues across the water.

On a morning in early April, the United States Navy released a photograph that was meant to say something without words. It showed two commanders—Robert J. Briggs and Richard D. Slye—stationed in the pilothouse of the guided-missile destroyer USS Mustin, watching the Chinese aircraft carrier Liaoning pass by at a distance of just a few thousand meters. In the image, Briggs sits with his feet up, relaxed, almost casual. His deputy sits beside him. The message, according to analysts, was deliberate: the Americans were not afraid.

This was what some observers called cognitive warfare—the use of perception and symbolism to shape how an adversary understands your strength and resolve. The photograph, taken on April 4 in the East China Sea, arrived at a moment when both the United States and China had positioned major naval assets in contested waters. Lu Li-shih, a former instructor at Taiwan's Naval Academy, read the image as a calculated statement of American confidence. "This staged photograph is definitely 'cognitive warfare' to show the US doesn't regard the PLA as an immediate threat," he said. The relaxed posture, the proximity, the willingness to document it all—these were not accidents of military routine. They were theater.

The photograph was one move in a larger game unfolding across the South China Sea. Days earlier, hundreds of Chinese vessels had appeared at Whitsun Reef, a disputed area within the Spratly Islands where the Philippines claims sovereignty. China said the ships were fishing vessels sheltering from bad weather. The Philippines saw an incursion into its exclusive economic zone and called on Beijing to withdraw them. China refused. The standoff raised the temperature in a region where territorial claims overlap and collide, where the stakes are both strategic and economic.

On the same day the photograph was released, the Armed Forces of the Philippines announced it would resume joint military exercises with the United States. The Balikatan drills, an annual ritual that had been suspended in 2020 due to the pandemic, would restart with a smaller footprint than usual. About 736 Filipino soldiers and 225 American troops would participate—roughly a quarter of the typical attendance. The exercises would blend virtual and physical components, a compromise between the need to train and the constraints of the moment. "It's a low-key exercise, just to keep the alliance—the contact—between the two armed forces," said Lt. Gen. Cirilito Sobejana, chief of the Armed Forces of the Philippines.

The timing was significant. Hours before the announcement, the U.S. Defense Secretary Lloyd Austin had spoken by phone with his Philippine counterpart, Delfin Lorenzana, who was recovering from a positive coronavirus test. They discussed the Whitsun Reef situation and the broader tensions in the sea. Austin proposed that the two nations deepen their defense cooperation by enhancing what he called "situational awareness of threats in the South China Sea"—a phrase that left room for interpretation but clearly pointed toward closer coordination on monitoring Chinese activity.

The United States also made explicit what had long been implicit. A State Department spokesman reminded China that Washington had treaty obligations to the Philippines. "An armed attack against the Philippines' armed forces, public vessels or aircraft in the Pacific, including in the South China Sea, will trigger our obligations under the US-Philippines Mutual Defense Treaty," the spokesman said. It was a warning dressed in the language of law and alliance.

Yet the picture was more complicated than a simple realignment. President Rodrigo Duterte, who had taken power in 2016, had spent years pivoting toward China and away from the United States. More than a year earlier, he had announced plans to terminate the Visiting Forces Agreement, the foundational document that allowed American troops to operate in the Philippines and that had anchored their nearly seventy-year alliance. That plan had since been suspended, but it remained a shadow over the relationship, a reminder that the Philippines was not a simple ally but a nation caught between two powers, trying to extract benefit from both while committing fully to neither.

The resumption of the Balikatan exercises, then, was not a return to the old order but a negotiation with uncertainty. The Americans were signaling commitment. The Filipinos were signaling openness to that commitment, at least for now. And China, watching from across the water, was taking its own measure of what these moves meant for the balance of power in a sea that belonged, by law and geography, to no single nation.

This staged photograph is definitely 'cognitive warfare' to show the US doesn't regard the PLA as an immediate threat.
— Lu Li-shih, former instructor at Taiwan's Naval Academy
An armed attack against the Philippines' armed forces, public vessels or aircraft in the Pacific, including in the South China Sea, will trigger our obligations under the US-Philippines Mutual Defense Treaty.
— U.S. State Department spokesman Ned Price
The Hearth Conversation Another angle on the story
Inventor

Why release that photograph at all? Why not just shadow the Chinese carrier quietly?

Model

Because the point isn't just to watch—it's to be seen watching. The photograph tells Beijing that the U.S. is comfortable enough with its position to document it, to make it public. It's a form of confidence that can't be faked if you're actually worried.

Inventor

And the relaxed posture—feet up, sitting down—that's intentional?

Model

Everything in that image is intentional. The casualness is the message. It says: we are so untroubled by your presence that our commanders can sit like this. It's the opposite of tension.

Inventor

But doesn't China do the same thing? Don't they also stage displays of power?

Model

They do. But in this moment, the U.S. was trying to reassure the Philippines and others in the region that American power was still the steadier force. The photograph was partly for Beijing, but also for Manila and for every other nation watching to see who would blink first.

Inventor

Why resume the exercises now, when Duterte has been so hostile to the U.S.?

Model

Because the situation at Whitsun Reef changed the calculation. When Chinese vessels mass in disputed waters, even a president who has leaned toward Beijing has to consider his own country's interests. The exercises are a way of saying: we're still here, we're still committed, and we can help you manage this.

Inventor

Is the reduced scale—225 Americans instead of more—a sign of weakness?

Model

No. It's a sign of constraint and pragmatism. The pandemic was real. But it also sends a message: we're doing this carefully, we're not escalating, we're keeping things measured. It's the opposite of a show of force.

Inventor

What happens if China doesn't withdraw from Whitsun Reef?

Model

Then the U.S. and Philippines will have to decide how far they're willing to go. The treaty obligation is clear, but executing it is another matter entirely. That's what the enhanced situational awareness is really about—preparing for scenarios that no one wants to actually face.

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