As their rivalry intensifies, U.S. and Chinese military planners are gearing up for a new kind of warfare in which squadrons of air and sea drones equipped with artificial intelligence work together like a swarm of bees to overwhelm an enemy.

The planners envision a scenario in which hundreds, even thousands of the machines engage in coordinated battle. A single controller might oversee dozens of drones. Some would scout, others attack. Some would be able to pivot to new objectives in the middle of a mission based on prior programming rather than a direct order.

The world’s only AI superpowers are engaged in an arms race for swarming drones that is reminiscent of the Cold War, except drone technology will be far more difficult to contain than nuclear weapons. Because software drives the drones’ swarming abilities, it could be relatively easy and cheap for rogue nations and militants to acquire their own fleets of killer robots.

The Pentagon is pushing urgent development of inexpensive, expendable drones as a deterrent against China acting on its territorial claim on Taiwan. Washington says it has no choice but to keep pace with Beijing. Chinese officials say AI-enabled weapons are inevitable so they, too, must have them.

The unchecked spread of swarm technology “could lead to more instability and conflict around the world,” said Margarita Konaev, an analyst with Georgetown University’s Center for Security and Emerging Technology.

MILITARY CONTRACTS OFFER CLUES

Drones have been a priority for both powers for years, and each side has kept its advances secret, so it’s unclear which country might have an edge.

A 2023 Georgetown study of AI-related military spending found that more than a third of known contracts issued by both U.S. and Chinese military services over eight months in 2020 were for intelligent uncrewed systems.

The Pentagon sought bids in January for small, unmanned maritime “interceptors.” The specifications reflect the military’s ambition: The drones must be able to transit hundreds of miles of “contested waterspace,” work in groups in waters without GPS, carry 1,000-pound payloads, attack hostile craft at 40 mph and execute “complex autonomous behaviors” to adapt to a target’s evasive tactics.

It’s not clear how many drones a single person would control. A spokesman for the defense secretary declined to say, but a recently published Pentagon-backed study offers a clue: A single operator supervised a swarm of more than 100 cheap air and land drones in late 2021 in an urban warfare exercise at an Army training site at Fort Campbell, Tennessee.

As the undisputed leaders in the field, Washington and Beijing are best equipped to set an example by putting limits on military uses of drone swarms. But their intense competition, China’s military aggression in the South China Sea and persistent tensions over Taiwan make the prospect of cooperation look dim.

The idea is not new. The United Nations has tried for more than a decade to advance drone non-proliferation efforts that could include limits such as forbidding the targeting of civilians or banning the use of swarms for ethnic cleansi

The CEO of a company developing software to allow multiple drones to collaborate said in an interview that the technology is bounding ahead.

“We’re enabling a single operator to direct right now half a dozen,” said Lorenz Meier of Auterion, which is working on the technology for the U.S. military and its allies. He said that number is expected to increase to dozens and within a year to hundreds.

Not to be outdone, China’s military claimed last year that dozens of aerial drones “self-healed” after jamming cut their communications. An official documentary said they regrouped, switched to self-guidance and completed a search-and-destroy mission unaided, detonating explosive-laden drones on a target.

In justifying the push for drone swarms, China hawks in Washington offer this scenario: Beijing invades Taiwan then stymies U.S. intervention efforts with waves of air and sea drones that deny American and allied planes, ships and troops a foothold.