The United States army announced last month that it would raise the maximum age at which Americans can enlist from 35 to 42 years to expand its pool of eligible candidates amid recruiting challenges in recent years.
An updated version of US Army Regulation 601–210, dated March 20, outlined the changes, including the elimination of rules requiring anyone with a single conviction for marijuana possession or drug paraphernalia to obtain a waiver to enlist.
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Government data shows that while the US army has met its recruitment goals over the last two years, it fell short in 2022 and 2023 and has consistently failed to meet targets for the Army Reserve, shortcomings that analysts have attributed to several possible factors.
The new age limit was announced during the US-Israel war on Iran, towards which young people have expressed widespread opposition.
Here’s what you need to know about the changes.
New recruits participate in the Army’s future soldier prep course that gives lower-performing recruits up to 90 days of academic or fitness instruction to help them meet military standards, at Fort Jackson, a US Army Training Center, in Columbia, South Carolina, on September 25, 2024 [File: Chris Carlson/AP Photo]
When does the regulation go into effect?
The updated version of Army Regulation 601–210 officially takes effect on Monday, April 20.
What has the military said about the changes?
The US army announced updated enlistment regulations on March 20, with the changes scheduled to take effect one month later on April 20 and applying to the Regular Army, Army Reserve, and Army National Guard.
The maximum enlistment age is raised from 35 to 42, and previous restrictions requiring anyone with a single conviction for possession of marijuana or drug paraphernalia to obtain a waiver to enlist are done away with.
Do these changes apply to the whole US military?
The changes announced in March are specific to the US army.
The military news outlet Stars and Stripes reported that those changes bring the army into greater alignment with the maximum enlistment age of other branches of the military, such as the Air Force, Navy, Coast Guard, and Space Force, which accept enlistees in their early 40s.
The maximum enlistment age for the US Marines is 28.
What factors explain the change?
While the US army did not comment on the reasons for the increase, data from the US Army Recruiting Command show that the army has struggled with recruitment challenges.
While the army met 100 percent of its recruitment goals in 2025 and 2024, it missed its target by about 23 percent in 2023 and 25 percent in 2022.
That data also shows that the army has fallen short of recruitment targets for the Army Reserve for the last six years in a row.
The average age of army recruits has risen in recent years to 22.7, up from 21.7 in the 2000s and 21.1 in the 2010s, according to the military news outlet Army Times, citing data from a US army spokesperson.
The US Army Recruiting Command has attributed such challenges to issues such as changes in the labour market, limited awareness about military service, and a lack of qualified young people due to issues such as obesity, drug use, and mental health issues.
A 2018 poll listed concerns over possible injury and death, post-traumatic stress disorder (PTSD), separation from family and friends, and other career interests as top reasons offered by young people for not joining the military.
Does the change have to do with the war in Iran?
Analysts have been discussing the possibility of raising the enlistment age for years as a means of addressing recruiting challenges, with a 2023 research report from the RAND Corporation, a US think tank, calling “older youth” a “crucial, largely untapped, yet high-quality pool of potential recruits”.
While the military has not suggested that the change is linked to the US-Israel war on Iran, where US President Donald Trump has previously said he could deploy ground troops, some social media users were quick to note the timing of the announcement.
Some in the online community joked that older supporters of the war would now be available to enlist.
“They raised the enlistment age to 42,” one X user said in response to a video of the conservative commentator Ben Shapiro praising Trump’s decision to attack Iran. “Why are you still here?”
Surveys have found that younger people are more likely to oppose the US war on Iran than those aged 65 and up, and polls in recent years have found that young people are more generally sceptical of US intervention abroad than older generations.
A 2024 Pew Research Center poll found that people between the ages of 18 and 29 were the only age bracket in the US who viewed the military more negatively than positively, with 53 percent saying the military had a negative effect versus 43 percent who said it had a positive effect.
How many people are currently in the US military?
According to the Pew Research Center, the US military has about 1.32 million active members. The US army accounts for the largest share, with nearly 450,000, while the US Navy is second with more than 334,000.
The Air Force has more than 317,000, the Marines more than 168,000, the Coast Guard nearly 42,000, and the Space Force nearly 9,700.
Data from the US Army Recruiting Command shows that about 80 percent of recruits in the Regular Army were men in 2025.
Black and Latino recruits also make up a larger share of army recruits than their percentage of the population, each making up about 27 percent of recruits while comprising 14 percent and 20 percent of the general population, according to data from the 2024 census.
White people made up about 40 percent of US army recruits, while about 57 percent of the general population.
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The U.S. Air Force is continuing to expand on the capabilities of the Angry Kitten electronic warfare pod, which just recently made its combat debut on the F-16 fighter in the latest conflict with Iran.
New testing has focused on improving the ability of HC-130J Combat King II combat search and rescue aircraft carrying the pods to receive reprogramming updates in near-real-time via satellite. HC-130Js just recently flew extremely high-risk and high-profile sorties over Iran as part of the effort to rescue the crew of a downed F-15E Strike Eagle. Being able to rapidly refine and optimize Angry Kitten’s capabilities will help the system remain as effective as possible, even in a very quickly evolving threat environment, and could be a stepping stone to more advanced functionality.
An HC-130J Combat King II assigned to the 129th Rescue Wing seen carrying an Angry Kitten electronic warfare pod while flying in the Point Mugu, California area on September 11, 2025. Fred Taleghani / FreddyB Aviation Photography
The pods have also been test flown on Air Force A-10 Warthog ground attack jets and Navy F/A-18 Super Hornet fighters. As noted, it is now being employed operationally on Air Force F-16s, as well. Angry Kitten was originally developed to replicate hostile electronic warfare threats during testing and training, as part of a cooperative effort between the Air Force and the Navy, and worked so well that it was adapted to operational use. We will come back to this later on.
An F-16C fighter with an Angry Kitten pod on its centerline station, seen flying a sortie in support of Operation Epic Fury against Iran. CENTCOMAn Angry Kitten pod under the wing of a Navy F/A-18E Super Hornet. USN Naval Air Warfare Center Weapons
During Bamboo Eagle, “AATC’s primary evaluation centered on the Angry Kitten electronic warfare pod integrated aboard a HC-130J Combat King II. The force development evaluation built directly on an operational assessment completed the previous year, which found the system potentially effective and suitable on the platform,” according to a press release that the center put out last week. “Testers incorporated recommendations from that assessment while the 130th Rescue Squadron flew the pod against simulated ship-based and ground-based threats during exercise vulnerability periods, evaluating both survivability and the system’s broader electronic attack capability.”
The 130th Rescue Squadron is part of the California Air National Guard’s 129th Rescue Wing.
“Running alongside that effort, AATC continued maturing the Ka/Ku-band communications suite, which enables over-the-horizon communications and near-real-time electronic warfare reprogramming via satellite link,” the release adds. “The suite compresses what was previously a multi-day technique development and distribution process to near-real-time between sorties.”
AATC has previously disclosed that it has been working on this capability, which looks to be unique to the integration of Angry Kitten on the HC-130J, at least currently. The Combat King II has the benefit of a wide-band satellite communication system, which is also found on U.S. special operations C-130 variants and other aircraft. The HC-130J carries the pod using a Special Airborne Mission Installation and Response (SABIR) system installed in place of its left rear paratrooper door.
An HC-130J with an Angry Kitten pod on a SABIR system mounted in place of its left rear paratrooper door. USAFA look inside the HC-130J during testing of the Angry Kitten pod. USAF
“The C-130 testing features innovative real-time updates to electronic warfare techniques,” AATC said in a previous press release in March 2025. “Unlike the F-16 tests, where pre-programmed mission data files were used, the C-130 testing includes development engineers aboard the aircraft who can modify jamming techniques mid-mission based on feedback from range control.”
As can be seen above, to date, AATC has largely framed the benefits of this reprogramming capability within the context of accelerating continuing test and evaluation of Angry Kitten. At that same time, this would also be extremely valuable in an operational context.
In general, electronic warfare systems use built-in threat libraries to accurately detect, categorize, and respond to waveforms. In turn, their effectiveness is inherently determined by the breadth of data in that library. Specialists, often working in purpose-built reprogramming laboratories far from the front lines, have to work tirelessly to keep these systems up to date. Historically, this has been a very lengthy process, and one that has increasingly had trouble keeping pace with the rate at which threats are evolving.
A member of the 16th Electronic Warfare Squadron, another unit with the 350th Spectrum Warfare Wing, analyzes radio frequency signals at the B-1 Lab at Eglin Air Force Base in Florida. (This photo has been altered for security purposes by blurring out portions of monitors). USAF
As noted, Angry Kitten was developed first as a training and testing tool. It is a direct outgrowth of the AN/ALQ-167 electronic warfare pod, variants of which have been used in those contexts for decades to mimic hostile electronic warfare threats. However, Angry Kitten was designed from the start to be more readily updatable and modifiable in order to make it easier to adapt it to new and evolving threats.
“At the core of that technology is Angry Kitten’s Technique Description Language architecture. Georgia Tech designed TDL as a hybrid that pairs dedicated hardware modules for speed and bandwidth with software for complex decision-making,” according to a press release Naval Air Systems Command (NAVAIR) put out last month. “The practical result: government programmers can reprogram the jammer to counter new threats without sending it back to the contractor for expensive, time-consuming code changes. When an adversary adapts its radar tactics, NAWCWD’s team can update the jammer’s response in days instead of waiting months for a contract modification.”
Angry Kitten is also known to make use of advanced Digital Radio Frequency Memory (DRFM) technology. Using DRFM, radio frequency (RF) signals can be detected and ‘captured.’ Those same signals can then be manipulated and retransmitted. As an example of what this means in practice, signals from enemy air defense radars or radar seekers on incoming missiles can be recorded and pumped back in a way that creates false or otherwise confusing tracks. That same data can also be used as part of the reprogramming process to improve the stability capabilities, as well as be further exploited for general intelligence-gathering purposes.
An Angry Kitten pod on a stand during test. USN
This all already contributed to the evolution of Angry Kitten into an operational system.
“We had a jammer called ‘Angry Kitten.’ It was built to be an adversary air jamming tool,” now-retired Air Force Gen. Mark Kelly, then commander of Air Combat Command (ACC), told TWZ and other outlets back in 2022. “And all of a sudden, the blue team said, ‘you know, hey, we kind of need that, can we have that for us?’ And so I see this iterating and testing our way into this.”
When it comes to near-real-time updates for Angry Kitten, even if the communications suite used on the HC-130J won’t fit on smaller tactical jets, it could potentially be ported over into a capability that is readily deployable to forward locations. Another possibility is that an aircraft with a wide-band satellite communications system could then pass updates for Angry Kitten to other aircraft within line of sight using other datalink capabilities.
Another view of the F-16 carrying the Angry Kitten pod during a mission in support of Operation Epic Fury. CENTCOM
The underlying developments have further implications when it comes to developing so-called cognitive electronic warfare capabilities. Cognitive electronic warfare is a broad area of development focused on new technologies to further automate or otherwise accelerate the reprogramming process. The absolute ‘holy grail’ of the overall concept is an electronic warfare system that can adapt autonomously in real time to new threat waveforms, or known ones being modulated in unexpected ways, even right in the middle of a mission. You can read more about all of this here.
Ongoing work to expand and improve Angry Kitten’s capabilities will also now benefit from lessons learned from the employment of the pods in combat sorties over and around Iran.
The multi-day effort to recover the crew of an F-15E Strike Eagle downed in that country earlier this month also highlighted the immense risks involved in combat search and rescue (CSAR) operations, and the importance of adding new self-protection capabilities to the HC-130J, specifically. Air Force Combat King IIs can expect to face far greater threats while conducting CSAR missions during a conflict with a near-peer adversary like China. This has prompted questions about the utility of HC-130Js and other traditional CSAR assets in the context of any future high-end fight.
In the meantime, Angry Kitten continues to evolve in significant ways, including its growing ability to receive key updated data remotely in near-real-time when paired with the HC-130J.
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The Air National Guard is pushing Congress to boost fighter numbers as it seeks to modernize its aging inventory. With the Air Force at large feeling the effects of years of underinvestment in new fighters, and with China presenting a massive pacing challenge, the move is the latest effort to ensure that the service can keep up in terms of numbers and capability.
According to a report from Air & Space Forces Magazine, Air National Guard adjutants general from more than 20 states sent a letter to Congress last week that requests multiyear funding for the acquisition of between 72 and 100 new fighters each year.
An F-15C assigned to the 123rd Fighter Squadron, Portland Air National Guard Base, Oregon, taxis to the runway at Nellis Air Force Base, Nevada, while an F-15EX assigned to the 85th Test and Evaluation Squadron, Eglin Air Force Base, Florida, prepares to take off. U.S. Air Force photo by William R. Lewis William Lewis
These numbers would be a significant hike compared with recent years: not since 1998 has the Air Force bought more than 72 new fighters in a single year.
“The United States Air Force is the oldest, the smallest, and the least ready in its 78-year history,” the letter states. “We must build a fighting force that will win.”
Specifically, the letter urges the minimum annual purchases of the 48 F-35As and 24 F-15EXs, with a preferred goal of 72 F-35As and 36 F-15EXs.
The 123rd Fighter Squadron was the first operational unit to receive the F-15EX. The first example for the unit is seen arriving at Portland Air National Guard Base on June 5, 2024. Oregon Air National Guard
While the letter was signed by Air National Guard leaders, these totals would be expected to furnish units of the Active, Guard, and Reserve components.
By comparison, the Air Force requested funding for 48 F-35As in Fiscal Year 2024, followed by 42 in 2025, 24 in 2026, and 38 in the proposed 2027 budget.
The Fiscal Year 2027 budget request also includes funding for the purchase of 10 F-35Bs and 37 F-35Cs for the Marine Corps and the Navy, which is already a notable uptick in planned acquisitions. At the same time, the F-35 program has faced worrisome delays in work on a new radar, as well as a host of other critical upgrades.
F-35As assigned to the 115th Fighter Wing, Truax Field, Madison, Wisconsin, receive fuel from a KC-135 Stratotanker assigned to the 128th Air Refueling Wing in Milwaukee. U.S. Air National Guard photo by Staff Sgt. Cameron Lewis Staff Sgt. Cameron Lewis
For the F-15EX, budget documents show the service requested 24 aircraft in 2024, 18 in 2025, 21 in 2026, and 24 in 2027.
A sustained annual buy of even 24 F-15EXs would represent an acceleration over current production plans for the Eagle II, after the Fiscal Year 2026 budget request increased the program of record from 98 to 129 aircraft, including funding for 21 jets in a single year. In its latest budget request, the Air Force provides no details about whether there may be any new changes to the planned total fleet size for the F-15EX.
One of those who signed the letter is Brig. Gen. Shannon Smith, head of the Idaho Air National Guard, who toldAir & Space Forces Magazine that, “We are burning these jets and the airmen over time to support the joint force to accomplish the president’s goals with Epic Fury in this conflict with Iran.”
U.S. Air Force Brig. Gen. Shannon D. Smith, pictured in 2024 when he was commander, District of Columbia Air National Guard. U.S. Air National Guard photo by Staff Sgt. Daira Jackson 113th Wing D.C. Air National Gua
On top of the demands of combat operations, Brig. Gen. Smith warned that the Air National Guard fighter fleet is rapidly aging, meaning that “Most of the money will go to keep them flying. In a few years, they’ll be struggling to be flyable, let alone be relevant.”
While plans are in place to replace A-10s and F-15Cs, even older F-35As will need replacement before too long, Smith added. More urgent is the looming requirement to supersede the more numerous F-16s.
A row of A-10Cs assigned to the 127th Wing, Michigan Air National Guard, under their shelters at Selfridge Air National Guard Base, Michigan. Photo by Terry L. Atwell/U.S. Air Force
In total, the Air National Guard has 24 fighter squadrons, 11 of which have already received new fighters or are planned to. While some Guard F-16 units have transitioned to the F-35, there is no plan in place for the Guard’s remaining 13 Viper squadrons. Taken together, the Guard’s inventory constitutes close to half of all combat-coded F-16s.
In the past, thought has been given to a new light fighter, to balance the more costly and capable F-35 and, now, the F-47, although that would be extremely costly and take years. Another option would be to start buying new F-16 Block 70/72 jets, although the production line is already burdened by multiple export orders.
Even if Congress supports the Air National Guard chiefs’ recommendations and the budget is available, getting new jets on ramps will be far from easy.
As well as boosting capabilities and ‘combat mass,’ new fighters bring other advantages in terms of reduced maintenance demands, easier access to spare parts, longer airframe life, and overall higher availability.
An F-16C fighter assigned to the Arizona Air National Guard’s 162nd Wing. Air National Guard
The issue of spare parts is a critical one. Back in 2024, we looked at how, by the Air Force’s own estimates, hundreds of its aircraft are at risk of being left grounded due to a lack of spares, thanks to a $1.5-billion shortfall in its budget request.
However, meeting the aim of 72 to 100 new fighters each year would demand a significant uptake in production capacity, which is already stretched. With that in mind, the Air National Guard projects it could still take 10 to 15 years to re-equip units now flying older fighters.
One option to re-equip Guard and Reserve units would be to cascade fighters down from the Active component, but Air National Guard chiefs warn against this, too, since it only pushes recapitalization with new fighters further down the line.
What is unclear is how the Air Force’s plans for the F-47 sixth-generation fighter might play into this.
A rendering of the F-47 developed under the Next Generation Air Dominance (NGAD) program. U.S. Air Force graphic Secretary of the Air Force Publi
At this point, however, there are still questions about how exactly the F-47 will fit into the Air Force’s future force structure and how many of the jets the service might actually procure. The jet was originally planned as a replacement for the F-22, but that appears to have changed, or is at least in limbo. It is by no means clear how long the F-22 will be around after the F-47 is introduced, but if the F-47 is delayed, it could come at the end of the F-22’s service life. If the Air Force intends to operate the two at the same time, at least for the earlier part of the F-47’s career, but delays in fielding it occur, this could also open up another gap in the combat mass.
Another factor is the service’s emerging plans for fielding its future fleets of Collaborative Combat Aircraft (CCA) drones, which are being designed from the ground up to work in close concert with current and future crewed jets. In the past, the Air Force has signaled that it wants to buy over 1,000 CCAs. However, this number is understood to cover multiple CCA increments, with Increment 1 being procured in numbers between 100 and 150 units, at least to start with.
Three examples of the YFQ-42A Dark Merlin, developed to meet the Increment 1 CCA requirement. General Atomics
Ultimately, the CCA effort aims to drastically improve the tactical jet fleet combat mass, which could offset the dwindling fighter force, and active-duty F-35 and F-22 units will get them first. Thereafter, they could be quickly rolled out to fourth-generation jets, too. On the other hand, the CCA concept still has much to prove and is not without risk.
In the background to all this are the concerns within the U.S. military leadership at large about the significant advances being made by the Chinese military and, in this case, its air arms. The People’s Liberation Army Air Force is rapidly expanding and modernizing at a scale that threatens to surpass the United States in both numbers and capability. Warning signs of a massive fighter expansion include an apparent new J-35 factory and the many Chinese CCA programs.
An underside view of the new-generation Chinese J-36 combat jet. Chinese internet via X
As long as the U.S. government continues to procure aircraft at comparatively slower rates, China has the opportunity to race ahead and is already producing advanced fighters in large quantities, creating a growing imbalance in the Indo-Pacific region.
Clearly, there are very many factors at play, not least budgetary. However, in making their case to Congress, Air National Guard bosses are once again underscoring the continued demand for crewed combat jets within the service, and at the same time, highlighting some of the challenges in keeping the fighter force at the top of its game.