“The bottom line,” said Mehdi Rahmati, a prominent Iranian analyst, “is that Iran has realised that it cannot manage the situation in Syria right now with any military operation and this option is off the table.”
Despite being largely overshadowed by the wars in the Gaza Strip and Lebanon, the Syrian civil war never ended and instead fell into a protracted stalemate. Diplomatic efforts to find a political solution have been stagnant for years.
The coalition of advancing rebels is led by Hayat Tahrir al-Sham, a group previously affiliated with al-Qaeda. Although it split with al-Qaeda in 2016 and has attempted to gain international legitimacy, it is still designated as a terrorist organisation by the US and the United Nations.
The group’s leader, Abu Mohammed al-Golani, said in an interview with The New York Times this week that his goal was to “liberate Syria from this oppressive regime”.
The reactions of Syria’s neighbours appeared to reflect the deep concerns about the spiralling and unpredictable war.
Lebanon announced it was closing all land borders with Syria except for one that links Beirut with Damascus. Israel said it would reinforce “aerial and ground forces” in the Golan Heights, which Israel seized from Syria after the Arab-Israeli War of 1967.
Jordan closed a border crossing with Syria after insurgents captured the area on the Syrian side, Jordan’s Interior Ministry said in a statement.
And beyond the main rebel advances, the Assad government appears to be losing other pockets of territory. The Syrian Observatory for Human Rights, a British-based war monitoring group, said that the city of Sweida, south of Damascus, was no longer under government control.
The Russian embassy in Damascus issued a statement warning Russians of “the difficult military and political situation in Syria.” The embassy reminded Russians “of the opportunity of leaving the country on commercial flights through operating airports.” Russia is one of Syria’s most important allies.
The sudden rebel advance, launched last week, has abruptly changed the landscape of the 13-year civil war.
The rebels have swept through major cities like Aleppo and Hama and captured a significant amount of territory across four provinces, while government forces seemed to put up little resistance.
US officials have been surprised by the rebels’ progress so far and had not assessed that the Assad government’s control on Aleppo was so weak. They said the rebels appeared to have quickly taken advantage of the chaos created by their offensive, whose success likely exceeded their own expectations.
If the rebels gain control of Homs, it would be a significant turn in fortunes for Assad. The city sits at the crossroads of major highways, including one that leads to Damascus. Without Homs, the government would lose a key buffer between rebel-held areas in the north-west and Damascus further south.
Early in the civil war, parts of Homs fell to the rebels. Over the years, government forces besieged and bombarded rebel-held areas to wrest them back, devastating parts of the city.
The opposition fighters heading towards Homs on Saturday came out of Hama, the city they breached just a day earlier.
While the rebels say their goal is to oust Assad, it is not clear what would happen if he were to fall. Many in the international community had come to grudgingly accept him as Syria’s leader, even after he violently crushed his country’s opposition and used internationally banned chemical weapons.
For them, Assad offered a semblance of control, while a rebel takeover threatened more uncertainties in a region already in upheaval. Some Arab states last year normalised diplomatic relations with the Assad regime after shunning his government for years.
Publicly, American officials have been cautious about Hayat Tahrir al-Sham. But inside the US government, some officials said they believe the group’s turn to a more pragmatic approach was genuine, adding that its leaders know they cannot realise aspirations to join or lead the Syrian government if the group is seen as a jihadi organisation.
The group has retained its identity as a conservative Islamist organisation, but it has shown itself to be pragmatic while governing Idlib, in north-western Syria, US officials said. In areas it has taken over, officials said, it has quickly focused on providing services to civilians.
In a briefing for reporters this week, Mouaz Moustafa, executive director of the Syrian Emergency Task Force, an opposition group that works with the US military, praised the group for turning on Aleppo’s electricity soon after it occupied the city.
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Moustafa said it was wrong to tie the group to its jihadi roots, insisting that it was not affiliated with terror groups. He urged the United States to give its full-throated support to the push against Assad, saying the offensive was in US national interests.
“Everyone should see this as Iran losing in Syria,” he said.
The rebel advance struck at a moment of weakness for Assad’s allies: Iran’s power has been curtailed by its conflict with Israel, and Russia’s military sapped by its invasion of Ukraine.
The Syrian government has relied on those countries and the Lebanese militant group Hezbollah – now battered by its own war with Israel – to fight the rebels.
Russian airstrikes to try to slow the recent rebel advance have been relatively sparse, in what analysts see as a sign of Russia’s limited ability to aid Assad.
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The Syrian Observatory said a Russian convoy had fled Deir el-Zour, the eastern city where Kurdish forces were advancing, and was headed to Damascus.
On Friday, the Syrian military struck rebels and their vehicles both north and south of Hama with artillery, missiles and airstrikes, assisted by Russia. Dozens of opposition fighters were killed and wounded, according to Syrian state media.
The Syrian military, after withdrawing from Hama following several days of fighting, issued an unusual statement explaining its pullback, saying that it was seeking to avoid battles that would endanger civilians.
But sacrificing Hama also enables the Assad government to shift its limited military forces to areas it regards as more important, such as Homs.
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President Recep Tayyip Erdogan of Turkey, who has backed some of the Syrian opposition, including rebel factions in the current offensive, said he had been frustrated with Assad over his unwillingness to negotiate over Syria’s future. He issued a qualified approval of the rebel advance.
“Idlib, Hama, Homs, and the target, of course, is Damascus,” Erdogan told reporters after Friday prayers in Istanbul, according to Turkish state media. “The opposition’s march continues. Our wish is that this march in Syria continues without incident.”
But Erdogan also seemed to express concern about the rebel advances, calling them problematic, according to the Reuters news agency.
“These problematic advances continuing as a whole in the region are not in a manner we desire; our heart does not want these,” he said. “Unfortunately, the region is in a bind.”
This article originally appeared in The New York Times.