In a stark and sobering message, Lt. Gen. Joel “JB” Vowell, deputy commanding general for U.S. Army Pacific, warned that a potential war with China would inflict devastating casualties unlike anything seen during the post-9/11 conflicts in Iraq and Afghanistan.

“Our assumptions for planning is that casualty estimates will be much higher than you might have seen or witnessed as part of the Global War on Terror between Iraq and Afghanistan and other places where there are very small numbers, relatively in contacts who were who were killed and injured, as compared to large-scale combat operations,” Vowell told reporters during a July 22 Defense Writers Group event in Washington, D.C. “A potential conflict with the People’s Republic of China likely would result in large-scale casualties.”

China's military capabilities have grown rapidly in recent years, with a rising arsenal of hypersonic missiles and other advanced systems posing a significant threat to U.S. naval power, especially its aircraft carriers.

These massive vessels can carry up to 5,000 sailors and Marines—making them high-value and high-risk targets in a Pacific conflict.

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“Those potential casualties are there, so we have to calculate that mass casualty event,” Vowell emphasized.

His remarks point to the strategic challenge of dealing with modern, large-scale warfare in the Indo-Pacific—far from the relatively controlled environments of past counterinsurgency campaigns.

The potential toll of such a conflict has also been explored by think tanks like the Center for Strategic and International Studies (CSIS), which has conducted over 50 war games focused on a possible Chinese invasion or blockade of Taiwan.

Image Credit: DoW

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The simulations estimate that the U.S. could suffer between 9,500 to 21,000 casualties—including both killed and wounded—and lose dozens of warships and hundreds of aircraft, according to retired Marine Corps Col. Mark Cancian, a senior advisor at CSIS.

Cancian explained that these figures might be conservative. “The reason the casualty numbers are not higher is the scenarios did not envision U.S. troops being involved in ground combat,” he said, adding that Taiwanese forces were assumed to bear the brunt of direct ground fighting with Chinese troops.

If American forces were drawn into defending or retaking contested territory like the Matsu or Kinmen islands—governed by Taiwan—U.S. losses would likely be significantly greater.

Medical support, a critical aspect of any military operation, would face unprecedented challenges in a conflict of this scale and geography.

In Iraq and Afghanistan, U.S. troops benefited from rapid medical evacuations—often within the "golden hour"—thanks to air superiority and a robust network of forward medical units.

That would not be the case in a high-intensity war with China.

“It’s not a simple problem of the golden hour,” Vowell said. Instead of a few troops injured by improvised explosive devices, “It’ll be hundreds.” He noted that far more troops would need to be evacuated and treated than in previous conflicts, presenting logistical hurdles not seen since World War II.

To cope with the expected volume of casualties, the U.S. military would need to rely on updated versions of Mobile Army Surgical Hospitals in forward-deployed areas, collaborate with allied nations, and conduct long-range patient evacuations.

But moving the wounded thousands of miles—potentially from areas like the Philippines to trauma centers in the continental U.S.—would be extremely difficult.

“Evacuating casualties from the Western Pacific to advanced trauma centers far from the front lines would be a ‘huge challenge’ given the vastness of the Indo-Pacific region,” Vowell said. “And I’ll be honest, I don’t know if we have the full answer on it.”

He pointed out that Manila is about 7,400 miles from San Diego—more than double the distance between New York and London—and even further when factoring in routes from places like the Arctic to New Zealand.

This vast distance, coupled with China’s capacity for persistent surveillance and precision strikes, could severely hamper evacuation operations.

Beyond the wounded, returning the fallen to their homeland might be just as daunting. Vowell recalled the grim legacy of World War II, where more than 17,000 U.S. service members were laid to rest in Manila American Cemetery.

“That’s why we have overseas cemeteries,” he said. “We don’t want to have to do that again.”

In light of the massive human, logistical, and geopolitical stakes, Vowell concluded with a powerful reminder of what’s ultimately at risk.

“And so, the ultimate goal here, ladies and gentlemen, is no war,” he said.

“It would be catastrophic on a humanitarian scale, civilians, military alike. It’d be catastrophic on a global economic scale. And so medically, we practice what to do to protect and to triage and to evacuate our soldiers, I think we’ve got work to do there.”

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