WASHINGTON — The Pentagon is contemplating in search of authorization to hold out airstrikes to help Afghan safety forces if Kabul or one other main metropolis is in peril of falling to the Taliban, doubtlessly introducing flexibility into President Biden’s plan to end the United States military presence within the battle, senior officers stated.

Mr. Biden and his high nationwide safety aides had beforehand recommended that after U.S. troops left Afghanistan, air help would finish as effectively, except for strikes geared toward terrorist teams that might hurt American pursuits.

However navy officers are actively discussing how they may reply if the fast withdrawal produces penalties with substantial nationwide safety implications.

No choices have been made but, officers stated. However they added that one possibility into consideration could be to suggest that U.S. warplanes or armed drones intervene in a unprecedented disaster, such because the potential fall of Kabul, the Afghan capital, or a siege that places American and allied embassies and residents in danger.

Any extra airstrikes would require the president’s approval. Even then, officers indicated that such air help could be exhausting to maintain over a prolonged interval due to the big logistical effort that might be mandatory given the American withdrawal. The USA will go away all its air bases in Afghanistan by subsequent month, and any airstrikes would more than likely need to be launched from bases within the Persian Gulf.

A possible fall of Kabul is the disaster more than likely to result in navy intervention after U.S. troops go away, officers stated. Intervening to guard Kandahar, Afghanistan’s second-largest metropolis, could be far much less sure, one official stated. Encroaching Taliban forces have more and more threatened a number of different city hubs in virtually each nook of the nation in latest months.

The dialogue suggests the diploma of concern in Washington in regards to the potential of Afghanistan’s navy to carry off the Taliban and keep management of Kabul and different inhabitants facilities.

And it’s the newest indication of the scramble by the US to handle the ramifications of Mr. Biden’s decision in April to order a full withdrawal — a aim that had eluded his two speedy predecessors, partly due to opposition from the military.

Whether or not to supply air help to Afghan safety forces after U.S. troops pull out is certainly one of a number of main questions on Afghanistan coverage that the administration is grappling with as Mr. Biden prepares to meet NATO allies in Europe subsequent week.

Additionally unresolved is how U.S. troops will perform counterterrorism missions to forestall Al Qaeda and different militants from rebuilding their presence in Afghanistan, and tips on how to permit Western contractors to proceed to help the Afghan navy. On the similar time, the C.I.A. is under intense pressure to seek out new methods to assemble intelligence and perform counterterrorism strikes within the nation.

With the Pentagon set to conclude the pullout of U.S. troops by early July, the Afghan navy — created, skilled and equipped within the picture of the American navy — is meant to begin defending the nation by itself.

Senior American officers say that the speedy crumbling of the Afghan navy just isn’t a foregone conclusion. However there may be little doubt that the Afghan forces are battered and prone to being overwhelmed, particularly if their commandos and air forces falter.

The USA just isn’t probably to supply extra air help to Afghan forces in rural areas, a lot of that are already underneath Taliban management, the officers stated. And even authorities enclaves across the nation, that are already underneath siege, are unlikely to obtain a lot navy assist from American warplanes, the officers stated. They spoke on the situation of anonymity to keep away from talking publicly about inside administration discussions.

When Mr. Biden introduced the withdrawal in April, he promised to help the Afghan authorities, together with its safety forces; however he appeared to point that the Afghans could be on their very own militarily after American and NATO troops left this summer season. “Whereas we is not going to keep concerned in Afghanistan militarily, our diplomatic and humanitarian work will proceed,” he stated on the time.

Officers stated then that the US would launch strikes in Afghanistan just for counterterrorism causes, in case there was intelligence about efforts to assault American pursuits.

A spokesman for the White Home’s Nationwide Safety Council declined to touch upon the choices underneath dialogue, saying the administration didn’t publicly focus on guidelines of engagement.

However officers say there seems to be some new flexibility within the interpretation of counterterrorism. They are saying a debate has risen within the administration over what, precisely, is the edge for turmoil in Afghanistan that might result in American airstrikes.

The dialogue displays classes realized from the rise of the Islamic State in Iraq, which compelled the Obama administration in 2014 to recommit troops and air cowl to defend Iraqi cities because the group encroached on Baghdad.

Senior officers stated that for the time being, that threshold seemed like a looming fall of Kabul, a state of affairs that might more than likely require a signoff from the president earlier than American warplanes — more than likely armed MQ-9 Reaper drones however presumably fighter jets — offered air help to Afghan forces.

Afghan officers stated that they had been advised by their American counterparts that the US would additionally cease any takeover of main cities, a obscure assertion with none clear backing.

That help could be powerful to keep up over any prolonged interval.

“It’s a really exhausting factor to do,” stated Gen. Joseph L. Votel, the previous commander of United States Central Command. “It’s an operation to get plane to Afghanistan, particularly when you’re having to come back from the Gulf or an plane service. There’s restricted loiter time for them to do something.”

There are already indicators of the difficulties that the US would face in sending crewed plane to hold out strikes after the withdrawal. As U.S. bases in Afghanistan shut, it has left pilots with a conundrum: What if one thing goes incorrect 1000’s of toes over Afghanistan?

Ahead Working Base Dwyer — a sprawling complicated within the south with a large touchdown strip — is closing in weeks, if not days. At that time, U.S. plane may have just one viable American navy base, Bagram, to divert to in the event that they face a mechanical or different problem in flight. Bagram will shut down when the withdrawal is full.

With restrictive guidelines of engagement that require hours of overhead surveillance earlier than an American airstrike is permitted, Afghan forces have tried to compensate, launching 10 to twenty airstrikes a day. U.S. surveillance drones are offering a wealth of coordinates to the Afghan Air Pressure, however Afghan pilots and plane are dealing with burnout and upkeep points that develop by the day as overseas contractors withdraw.

“Our coverage needs to be to do every thing potential, in line with not having troops on the bottom, to allow the legit Afghan authorities and safety forces to carry on,” stated Consultant Tom Malinowksi, Democrat of New Jersey and a former State Division official.

Mr. Malinowski final month joined more than half a dozen other House Democrats and Republicans in urging Mr. Biden to supply an array of help to the Afghan authorities after American troops go away, together with any info on impending Taliban assaults detected by U.S. surveillance plane and spy satellites.

Prime American generals have acknowledged that the Afghan safety forces might collapse in a 12 months or two, or perhaps a matter of months, after the departure of Western navy help.

Gen. Mark A. Milley, the chairman of the Joint Chiefs of Workers, supplied reporters touring with him final month a lukewarm assertion in regards to the talents of the Afghan forces. After 20 years of battle, 1000’s of casualties and large sums of cash spent on the Afghan navy and police, he characterised them as “moderately effectively outfitted, moderately effectively skilled, moderately effectively led.”

When pressed on whether or not he thought the Afghan forces might maintain up, Basic Milley was noncommittal.

“Your query: The Afghan military, do they keep collectively and stay a cohesive combating pressure, or do they crumble? I feel there’s a variety of eventualities right here, a variety of outcomes, a variety of potentialities,” he stated. “On the one hand, you get some actually dramatic, dangerous potential outcomes. Then again, you get a navy that stays collectively and a authorities that stays collectively.

“Which certainly one of these choices obtains and turns into actuality on the finish of the day?” he stated. “We frankly don’t know but.”

When requested at a Pentagon information convention final month if Afghan cities had been in peril of being overrun by the Taliban after American forces left, Protection Secretary Lloyd J. Austin III declined to say whether or not the US would supply air help, saying it was a hypothetical state of affairs.

Zalmay Khalilzad, the highest U.S. diplomat main peace efforts with the Taliban, issued final month what appeared to be a definitive assertion on the matter.

“We’ll do what we will throughout our presence till the forces are withdrawn, to assist the Afghan forces, together with coming to their protection when they’re attacked,” he advised the Home Overseas Affairs Committee. “However as soon as we’re out of Afghanistan, direct navy help of Afghan forces equivalent to strikes in help of their forces, that’s not being contemplated right now.”

However three different American officers stated the difficulty had not been resolved in high-level administration conferences on Afghanistan.

Helene Cooper and Eric Schmitt reported from Washington, and Thomas Gibbons-Neff from Kabul, Afghanistan.