• The secretary of defense nominee pledged to re-recruit troops discharged over COVID-19 vaccine refusal.
• Over 8,400 troops were separated due to the vaccine mandate, which has now been rescinded.
• Hegseth said discharged troops should receive back pay, restored ranks, and an apology.

President-elect Donald Trump's pick for secretary of defense, Pete Hegseth, pledged Tuesday to re-recruit troops forced out of the military for refusing to receive the COVID-19 vaccine, and said they would receive back pay, restored ranks, and an apology.

"Service members who were kicked out because of the experimental vaccine," Hegseth told lawmakers, "they will be apologized to. They will be reinstituted with pay and rank."

Hegseth, if confirmed by the Senate, would build on the groundwork laid by Trump, who told supporters last summer he would "rehire every patriot who was fired from the military," because of the vaccine mandate.

Over 8,400 troops were separated from the services after refusing to receive the vaccine following a lawful order from Secretary of Defense Lloyd Austin in 2021. The Pentagon argued that the vaccines, similar to over a dozen others servicemembers receive, were crucial to military readiness.

The Pentagon reversed course and dropped the vaccine mandate in 2023 following a decision by Congress. At that time, it stopped separating troops who had not received the shot. Roughly 99% of the active-duty Navy, Marine Corps, and Air Force had been vaccinated and around 98% of the Army. Guard and Reserve rates were lower but over 90%.

Sen. Jim Banks, a Republican from Indiana, asked if Hegseth Tuesday if he would commit to "recruit these folks back" with back pay.

"I will commit to this because the Commander in Chief has committed to this," Hegseth replied. "Not only will they be reinstated, they will receive an apology, back pay, and rank that they lost because they were forced out due to an experimental vaccine."

Top military brass considered the possibility of providing back pay to troops after the vaccine mandate was repealed in early 2023, but Hegseth's remarks Tuesday drive home the incoming administration's intent to re-recruit separated troops back into the military. It is the first such indication since Trump won reelection in November.

Such a change could affect the Marine Corps, the DoD's smallest service, the most — of the roughly 8,400 troops discharged, 3,717 were Marines. For the other services, 2,041 were discharged from the Navy, 1,841 from the Army, and 834 from the Air Force.

Republicans have long criticized these separations, arguing they were unnecessary and detrimental amid US military recruitment struggles. The military, however, maintained that the mandate was a lawful order essential to readiness and the well-being of the force.

• The Air Force and Space Force must grow over the next two decades to counter emerging threats.
• China's rapid military advancements pose a significant challenge.
• The US is boosting cyber defenses and AI, with "machine speed" being necessary for some decisions.

Winning wars 25 years from now will hinge on achieving an edge in artificial intelligence and the ability to make certain decisions at inhuman speeds, the US Air Force's top civilian official said Monday.

Future war will be "highly automated, highly autonomous, action at long range, precision," and space will be a "decisive theater," Air Force Secretary Frank Kendall said. "Response times to bring effects to bear are very short."

Advances in technology, including the proliferation of sensor technology and machine learning, have led to the ability to execute complex kill chains on faster timelines. Maintaining a competitive edge demands change and further innovation.

"We're going to be in a world," Kendall said, "where decisions will not be made at human speed; they're going to be made at machine speed." Meeting that challenge will mean transforming the Department of the Air Force through AI to shield troops from a range of threats and prepare for higher-level combat.

Kendall's remarks on Monday at a Center for Strategic and International Studies event looking at Air Force plans for the future align with Air Force leadership visions for 2050.

A December 2024 report titled The Department of the Air Force in 2050 says that the "areas of conflict that move at speeds vastly exceeding human decision time constants, such as cyber warfare and electronic warfare, are likely to be dominated by AI technologies that assess events happening at unimaginably fast speeds and unimaginably small dimensions."

"These technologies will be used to make crucial decisions with no possibility of human intervention," the report says. "Victory or defeat in the air or in space at the human scale is likely to be determined by which combatant has fielded the most advanced AI technology in the areas most crucial to achieving victory."

The Air Force secretary has previously said that he doesn't think people who say that AI is "going to determine who's the winner in the next battlefield" are "all that far off."

What Air Force leadership says is needed for future fights

"China is doing everything it can to exploit the opportunities that emerging technologies are providing to field forces designed to defeat the United States in the Western Pacific, especially in space and in the air," the Air Force plans for 2050 say.

The Air Force and Space Force have expressed concern over the pace at which China has been developing military space capabilities, including a network of hundreds of military satellites that may assist in targeting troops, among other challenges.

"The joint force will not be able to go anywhere and do anything unless we can protect it from targetings in space," Kendall explained Monday.

A more powerful Space Force is a must to combat China's growing abilities, Kendall said. "We have to go from having a merchant marine [force] to essentially having a Navy," the secretary said, comparing where the force is today and where it needs to eventually be to civilian cargo mariners and armed naval forces.

The Space Force was established during the first Trump administration and remains in the early stages of development. But strengthening US technological capabilities doesn't stop there.

The US needs to boost defense against cyber-attacks while also increasing offensive capabilities, Kendall said, adding that he expects more developments on both fronts this year. That sentiment comes on the heels of a recent alarming hack of US telecommunications systems and the US treasury, allegedly by Chinese hackers.

Autonomous vehicles and aircraft are also expected to become more prolific and play a greater role in future wars. "The only open questions about autonomy are how fast it will mature and what form it will take," the Air Force said in its report on 2050.

"The direction is quite clear at this point," it said. "By 2050, we can reasonably expect autonomous vehicle operation to be the norm, in all domains."

The Air Force has already begun experimenting with AI-assisted flight navigation for some of its jets in anticipation of a space attack that could cripple satellite-based GPS communication. It is also developing uncrewed collaborative combat aircraft and experimenting with AI-piloted fighter aircraft, key developments amid Beijing's investment in its own air forces, which is gradually eroding American air supremacy.

Autonomous military platforms and other variants of AI rely so heavily on chip technology, which the Biden Administration has put new restrictions on.

"To enhance US national security and economic strength, it is essential that we do not offshore this critical technology and that the world's AI runs on American rails," read the White House announcement.

But one of the hardest challenges in the decades to come will be how American troops and machines work together at war, Kendall said. "We're gonna have to figure out how to manage this in a way which is cost effective, which is consistent with our values, which is militarily competitive."

And, he said, "I think that's gonna be a tough problem to resolve."

• NATO pit elite divers against new sensors to protect undersea cables from sabotage.
• Foreign adversaries have increasingly targeted undersea cables and underwater infrastructure.
• The training marks another shift in how NATO countries are preparing for future warfare.

NATO sent special operations divers to test new systems designed to help shield critical underwater infrastructure from damage and sabotage, growing problems.

Underwater cables and pipelines providing internet connectivity and energy have been damaged in a string of alarming incidents in recent years, with accusations of sabotage being thrown around about several just in the past couple of months.

These incidents highlight the vulnerability of these lines, but the NATO alliance is looking for answers.

Last fall, elite special operations divers from within the NATO alliance practiced bypassing underwater electronic detection sensors as part of an effort to boost protection for critical underwater infrastructure. NATO shared footage this week of the November training event — Exercise Bold Machina 2024 in La Spezia, Italy — as well as commentary from leadership.

The 13-nation event was the first of its kind, said US Navy Capt. Kurt Muhler, the maritime development director at the NATO Special Operations Headquarters, and was designed to test new sensors that could be used to defend against underwater sabotage attempts. This exercise, which Defense News first reported on, also tested allied special operations divers and their abilities to operate in increasingly transparent battlespaces.

Divers on offensive operations may not always be able to rely on dark, opaque waters to conceal their movements, Muhler, who has held SEAL team leadership positions, said, citing increased advancements in underwater detection system technologies.

"It's not knowing if somebody knows, or if you're being detected," Muhler told Defense News last fall. "It is understanding that there is a system that has the capability to detect you, but that you know nothing about it and don't know exactly what the capability is."

Undersea cables, pipelines, and other critical underwater infrastructure are at risk

The joint exercise in Italy came as damage to critical underwater infrastructure has become increasingly worrisome to Western officials who are scrambling to deter more damage to cables from vessels often quietly linked to Russian and Chinese governments.

Several underwater cables have been damaged in the past two months, including one telecommunications line linking Finland and Germany and another connecting Finland and Estonia.

Finnish officials said that they found a 60-mile seabed trail suggesting a tanker linked to Russia might be responsible for cutting cables. And around the same time, cables linking Germany and Finland and Sweden and Estonia were damaged with a Chinese vessel detected nearby when the damage occurred.

Such damage has spurred British defense officials to create a new joint operation with 10 European countries throughout the Baltic Sea area, using artificial intelligence to monitor potential threats from ships.

Undersea cables are critical components of international telecommunication infrastructure and the global economy — around 745,000 miles of cables span global seabeds and help transmit 95% of international data, including around $10 trillion in financial transactions daily.

NATO officials highlighted growing threats to cables from Russia last year, noting surveillance activity from Russian units specializing in undersea sabotage. But the barrier to entry for sabotage isn't particularly high. Russia has submarine units known to specialize in underwater sabotage, but cables have also been damaged by commercial vessels simply dragging their anchors along the sea floor.

And the concerns about the risk of underwater cable and infrastructure damage are not limited to European waters. Damage just last week to cables off the coast of Taiwan left that island's officials suspecting intentional damage from China.

"The underwater domain is hard both to protect and hard to attack," said Alberto Tremori, a NATO Centre for Maritime Research and Experimentation scientist who helped oversee the November NATO exercise. "It's not easy to protect because it's a complex environment, it's a vast environment."