A growing number of voices inside and around the Pentagon are saying out loud what used to be whispered. A top secret U.S. government assessment called the “Overmatch Brief” concludes that China could defeat the United States in a war over Taiwan.

The report was prepared by the Office of the Director of Operational Test and Evaluation, which reviews critical military problems and delivers them to senior White House officials. The New York Times obtained the document and described its findings as both consistent and disturbing.

According to officials who saw the brief, a senior national security aide in the Biden administration literally turned pale when he realized that, for every advanced tactic the U.S. planned to use, China had layers of backup responses ready.

Outside government, experts who have participated in Taiwan war games are reaching similar conclusions. Eric Gomez, a research fellow at the Taiwan Security Monitor, took part in one such simulation. He said the outcome of the conflict was uncertain, but the cost to U.S. forces was staggering.

At the political level, Defense Secretary Pete Hegseth has publicly admitted that, in internal Pentagon war games against China, “we lose every time.” Those statements, combined with the Overmatch Brief, are painting a stark picture of what a real fight over Taiwan might look like. However, followup research on his remarks, indicate that he is speaking only of certain scenarios, not of combat in general.

The Overmatch Brief and its grim scenario

The Overmatch Brief models a specific scenario. China launches a military invasion of Taiwan. The United States decides to intervene, sending ships, aircraft, and other forces to help defend the island.

Under that scenario, the report judges that China has the ability to destroy many of America’s most advanced weapons before they even get close to Taiwan. The newest U.S. aircraft carrier, the USS Gerald R. Ford, is used as a case study.

The Ford is a $13 billion ship packed with cutting edge technology: advanced nuclear reactors, new electromagnetic catapults for launching planes, and a large air wing. It was designed to replace older Nimitz class carriers and to project American power across the world.

In the war games described in the Overmatch Brief, that flagship does not survive. The carrier and its escorts are repeatedly destroyed by Chinese weapons, especially hypersonic missiles and quiet diesel electric submarines. The report argues that the Ford might be effective against a poor or weak state, but it is critically vulnerable against a major power like China.

Despite this, the Pentagon still plans to build at least nine more Ford class carriers, while the United States has yet to deploy a single hypersonic missile of its own.

Why analysts think the U.S. comes out behind

The core problem, according to the Overmatch Brief and related analysis, is the mismatch between how the U.S. builds its military and how China is building its own.

The United States has bet heavily on a small number of very complex, very expensive systems: stealth fighters like the F 35, giant aircraft carriers, and sophisticated missile defenses. These systems are powerful but also slow and difficult to mass produce.

China, by contrast, is pouring resources into large numbers of cheaper but still advanced weapons. The report notes that Beijing has built an arsenal of around 600 hypersonic missiles that can travel at about five times the speed of sound. These weapons are extremely hard to intercept and are designed to sink ships like the Ford before they can even get within range of Taiwan.

China also displayed YJ 17 ship killer missiles, estimated to reach about eight times the speed of sound, during a military parade in Beijing. Alongside that, the report warns that China has developed the ability to attack U.S. reconnaissance and communications satellites, threatening the eyes and ears of American forces in the Pacific.

The Overmatch Brief ties this to a deeper structural issue. The U.S. defense industrial base has shrunk into an oligopoly of just five major contractors, down from dozens in the 1990s. These companies tend to sell more complex and more expensive versions of the same ships, aircraft, and missiles. That makes it extremely difficult to ramp up production quickly in a long war.

The report points out that U.S. defense spending is about 3.4 percent of gross domestic product, near its lowest level in more than eighty years, even as new threats like artificial intelligence weapons, cyber attacks, and biological warfare emerge.

What the war games show in detail

Eric Gomez’s experience in a Taiwan war game illustrates how those trends play out on the virtual battlefield. In the simulation he joined, the end result of the overall conflict was unclear, but U.S. forces suffered punishing losses.

He described the outcome as a sobering shock. In the scenario, the United States lost more than one hundred fifth generation aircraft, including many F 35s. Multiple destroyers were sunk. Several submarines and even a couple of aircraft carriers were taken out. U.S. tactical air power in the theater was rapidly degraded.

His reaction summed it up: looking at the after action review, participants felt as if they were staring at a “heavy toll” that would be politically and militarily hard to accept in the real world.

Pete Hegseth’s comments push the warning even further. He has said that, in Pentagon war games against China, U.S. forces lose every time, and that Chinese hypersonic missiles could destroy aircraft carriers in just minutes.

Taken together, these exercises suggest that any U.S. intervention in a fight for Taiwan would involve enormous losses in ships, aircraft, and personnel, even if Washington eventually managed to stop a Chinese takeover.

The new age of cheap and lethal weapons

The Overmatch Brief and the New York Times editorial that discusses it place the Taiwan scenario in a broader revolution in warfare.

Recent conflicts, especially the war in Ukraine, have shown how small, relatively cheap systems can defeat much larger and more expensive platforms. Ukrainian forces have used inexpensive remote controlled boats loaded with explosives to neutralize Russian warships in the Black Sea. Small drones, built from commercially available parts and costing only hundreds of dollars, have been used by both Ukraine and Russia to destroy tanks, artillery, and even heavy bombers deep inside enemy territory.

These examples show how mass produced robotic weapons can turn battlefields into something like a mix between a First World War trench and a science fiction movie. They also reveal how vulnerable traditional “prestige” systems have become when they face swarms of low cost, smart weapons.

The Overmatch Brief argues that the U.S. military has been slow to adapt. American planners still often assume that more sophisticated is always better. The Army, for example, has tended to pursue its own advanced drones that cost tens of thousands of dollars each instead of accepting thousands of simpler systems.

At the same time, the United States struggles to produce even traditional weapons at scale. The report notes that in a short war involving Iran’s ballistic missiles, the U.S. used about one quarter of its stockpile of high altitude interceptors in just twelve days while helping defend Israel. After years of supporting Ukraine, Washington still cannot produce enough Patriot missiles to meet Kyiv’s demands.

Congress has earmarked about one billion dollars to produce 340,000 small drones over two years, a step toward matching the new style of warfare, but the gap between the U.S. procurement system and real world needs remains wide.

How leaders and commentators are reacting

The New York Times editorial board uses the Overmatch Brief as the opening chapter in a series arguing that the U.S. military must reinvent itself. The board warns that, nearly forty years after the end of the Cold War, American forces are not prepared for today’s threats or technologies.

The editors compare the current moment to famous historical failures, such as the French army’s reliance on the Maginot Line before World War II or Russian tank formations in Ukraine that were devastated by modern anti tank weapons. In their view, the United States risks repeating that pattern by clinging to old concepts and platforms while rivals innovate.

Inside the Pentagon, there have been attempts to push change. The former Marine commandant, General David Berger, removed tanks from the Marine Corps to build a lighter force better suited to countering China, despite strong institutional resistance. Some unsafe or unreliable programs, like the M10 Booker light tank, have been canceled. The White House has proposed reforms to how the military buys weapons.

Still, the editorial board argues that inertia in Congress, the influence of the big defense contractors, and a culture that favors traditional symbols of power have slowed true transformation.

The Overmatch Brief also looks beyond the United States and points to the need for allied support. It emphasizes that China’s industrial capacity is so large that it can only be balanced by pooling resources from partners like Japan, Europe, and Canada. Observers expect the Trump administration to use the report as further justification for demanding higher defense spending from allied nations, even as it continues to invest in big systems like the Ford class carriers.

What it means for a future Taiwan crisis

All of these warnings lead back to the central question. If China moved against Taiwan, could the United States really lose?

The Overmatch Brief stops short of declaring an automatic defeat, but it clearly states that China now has the ability to destroy many U.S. forces before they can effectively defend the island. War games and expert simulations show that the cost in ships, planes, and lives would be enormous. Senior officials admit that current exercises often end in U.S. failure.

The editorial board’s conclusion is that this is less a prediction than a warning. The United States needs a stronger and smarter military first and foremost to prevent wars, not to start them. That means shifting away from overreliance on a few expensive, vulnerable platforms and toward innovation, adaptability, and mass production of effective weapons.

In other words, the message from the Overmatch Brief and from those who have seen it is simple. If the United States does not change how it prepares for war in the Pacific, a conflict over Taiwan may one day prove that the warning came too late.

ACZ Editor: We are reporting this as is, but I’m thinking these conclusions largely a figment of the NY Times imagination. While it is important to run wargames and test for vulnerabilities, such pessimism is not likely warranted. No doubt it would be difficult to take on China in their home territory, but to indicate that we would crumple and slink away is not realistic (at least under this President). China is formidable and a war would not be a cakewalk, but our military is still by far the best in the world. And spreading the blame to the whole military-industrial complex is just obtuse.