ISIS Terror Group Casts Shadow Over Post-Assad Syria

The notorious terrorist group’s prospects in Syria will depend largely on the country’s new Islamist leadership, experts say.
ISIS Terror Group Casts Shadow Over Post-Assad Syria
U.S. forces patrol in Syria's northeastern city Qamishli, in the Hasakeh province, mostly controlled by Kurdish-led Syrian Democratic Forces (SDF), on Jan. 9, 2025. Delil Souleiman / AFP via Getty Images
Adam Morrow
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Last month’s collapse of the Syrian government has prompted fears that the ISIS terrorist group, which overran much of the country a decade ago, could make a comeback.

“History shows how quickly moments of promise can descend into conflict and violence,” U.S. Secretary of State Antony Blinken said a day after Syrian President Bashar al-Assad’s regime—and army—collapsed last month.

“ISIS will try to use this period to reestablish its capabilities,” he added.

According to Ambassador Matthew Bryza, a former White House and senior State Department official, the group’s ability to mount a comeback “will depend on how—and whether—the new Syrian government can consolidate its authority and field a new national military force able to ensure security.”

An ideological offshoot of Al-Qaeda, ISIS overran vast swathes of Syria—along with much of neighboring Iraq—in the period from 2014 to 2017.

By 2019, the group’s presence in Syria had been largely eradicated by a U.S.-led coalition working alongside Washington’s local Kurdish allies.

In that year, U.S. forces killed ISIS leader Abu Bakr al-Baghdadi in northwestern Syria on the orders of then-president, now President-elect Donald Trump.

Reflecting the conflict’s complex dynamics, Washington’s adversaries in Syria—including Russia, Iran, and the Assad regime—also played significant roles in crushing the terrorist group.

US Presence in Syria

On Dec. 8, the Syrian regime collapsed in the face of a Turkey-backed rebel offensive led by Hayat Tahrir al-Sham (HTS), a U.S.-designated terrorist organization.

On the very same day, the U.S. military conducted dozens of airstrikes against what it described as “ISIS leaders, operatives, and camps” in central Syria.

U.S. Central Command (CENTCOM) said the strikes were meant to ensure that the terrorist group “does not seek to take advantage of the current situation to reconstitute in central Syria.”

A week later, the U.S. military carried out a fresh round of strikes, which killed a dozen members of ISIS, according to CENTCOM.

For the past decade, the United States has kept a sizeable military presence in eastern and northeastern Syria, currently estimated at some 2,000 troops.

The deployment is part of a U.S.-led coalition tasked with defeating ISIS.

Fighters from the Turkish-backed Syrian National Army faction look on from a window in a house at a position near the Tishrin Dam in the vicinity of Manbij, in the east of Syria's northern Aleppo province, on Jan. 10, 2025. (Aaref Watad / AFP via Getty Images)
Fighters from the Turkish-backed Syrian National Army faction look on from a window in a house at a position near the Tishrin Dam in the vicinity of Manbij, in the east of Syria's northern Aleppo province, on Jan. 10, 2025. Aaref Watad / AFP via Getty Images

In 2019, during his first term as president, Trump vowed to withdraw U.S. forces from Syria—a promise that ultimately failed to materialize.

At the time, Trump’s pledge drew fierce criticism from his domestic political opponents, who accused him of abandoning Washington’s Kurdish allies.

This week, U.S. Defense Secretary Lloyd Austin said American troops were set to remain in Syria to prevent a resurgence of the terrorist group.

“We still have some work to do in terms of keeping a foot on the throat of ISIS,” he told The Associated Press on Jan. 9.

According to Austin, U.S. forces are also needed to secure a string of detention camps in northeastern Syria in which thousands of former ISIS fighters—and their families—are being held.

Sebastian Gorka, President-elect Donald Trump’s pick for deputy assistant to the president and senior director for counterterrorism, speaks during an interview with The Epoch Times on Dec. 17, 2024. (Madalina Vasiliu/The Epoch Times)
Sebastian Gorka, President-elect Donald Trump’s pick for deputy assistant to the president and senior director for counterterrorism, speaks during an interview with The Epoch Times on Dec. 17, 2024. Madalina Vasiliu/The Epoch Times

‘International Problem’

Tens of thousands of people are being held in the camps, which are currently run by the Syrian Democratic Forces (SDF), a Kurdish-led group supported by Washington.

Austin said that SDF members could eventually be “absorbed” into Syria’s military under the country’s new leadership.

“Then Syria would own all the [detention] camps and, hopefully, keep control of them,” he said.

According to an April 2024 report from Amnesty International, an estimated 56,000 men, women, and children are being held in the camps, most of whom had been “arbitrarily and indefinitely detained.”

“People detained following the territorial defeat of [ISIS] … are facing systematic violations and dying in large numbers due to inhumane conditions,” the report states.

The detention camps and their inmates, most of whom are foreign nationals, have caused friction between the United States and its allies.

Since the extirpation of ISIS in 2019, Washington has urged its partners to repatriate their citizens who are still being held in the detention camps.

Speaking to the Times of London, Sebastian Gorka, Trump’s pick for counterterrorism chief, said the UK should repatriate an estimated 30 British nationals who are currently interred in the camps.

“Any nation which wishes to be seen as a serious ally and friend of the most powerful nation in the world should act in a fashion that reflects that serious commitment,” Gorka told the newspaper on Jan. 8.

A British government spokesman responded by saying that London’s priority was to “ensure the safety and security of the UK.”

According to Bryza, there are only two ways to solve what he described as a “terribly complex situation.”

“The first is that they [detainees] remain in those camps forever,” Bryza told The Epoch Times. “The second is that they be repatriated.”

“Gorka’s demand that the UK take back its nationals, along with other countries whose citizens are being held in the camps, is logical,” he said.

“Because the only other alternative is leaving them there forever,” he added.

Ayhan Doganer, a former Turkish diplomat who previously served in both Syria and Lebanon, described the issue as an “international problem,” the resolution of which “will not be easy.”

Using another force to guard the camps—instead of the U.S.-backed SDF—“would only solve the problem temporarily,” Doganer told The Epoch Times.

Members of Syria's Hayat Tahrir al-Sham (HTS) alliance, led by al-Qaeda's former Syria affiliate, parade with their flags and those of the Taliban's "Islamic Emirate of Afghanistan" in the rebel-held city of Idlib on Aug. 20, 2021. (Omar Haj Kadour /AFP via Getty Images)
Members of Syria's Hayat Tahrir al-Sham (HTS) alliance, led by al-Qaeda's former Syria affiliate, parade with their flags and those of the Taliban's "Islamic Emirate of Afghanistan" in the rebel-held city of Idlib on Aug. 20, 2021. Omar Haj Kadour /AFP via Getty Images

Shared Ideologies

Further complicating the situation, HTS, Syria’s new de facto ruler, is ideologically descended from ISIS.

How this will affect Western efforts to combat ISIS in Syria remains open to question, according to experts.

“The fact that HTS leader Ahmed al-Sharaa was previously a member of Al-Qaeda and the Nusra Front, which worked with ISIS, has certainly hindered Western confidence in the [HTS] group,” Bryza said.

“But I also believe that al-Sharaa has broken with his past,” he added, pointing out that HTS “subsequently fought against Al-Qaeda and ISIS.”

“Nobody knows how sincere they are,” Bryza continued. “But they’ve paid with their blood, and in some cases their lives, fighting Al-Qaeda and ISIS in Syria.”

Ultimately, he said, HTS’s commitment to a democratic Syria “will be judged by its actions.”

According to Doganer, HTS, ISIS, and Al-Qaeda all hail from the same “Salafist and Takfiri ideology.”

“Although Ahmed al-Sharaa is a revisionist, the situation may be different for HTS’s components,” he said.

“Al-Sharaa’s shift toward moderation risks alienating hardline factions within HTS, potentially sparking internal dissent,” he added.

“It will be a long process for HTS to gain the trust of the West,” added Doganer, who currently works as a senior analyst at the Istanbul-based Center for Economics and Foreign Policy Studies.

Reuters and The Associated Press contributed to this report.