The withdrawal is being seen by the Kurdish-spearheaded Syrian Democratic Forces (SDF) in the region, which were key in a US-led campaign against the Islamic State of Iraq and the Levant (ISIL or ISIS) armed group, as leaving them open to attacks by Turkey.
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Ankara has long maintained that it wants to clear the border area from “terrorist elements”. Washington said it “will not support or be involved” in such an operation but that its forces “will no longer be in the immediate area”.
As Turkey’s move looms, here is what you need to know.
What is Turkey’s goal?
Turkey wants to create a so-called “safe zone” stretching 32km (20 miles) into bordering Syria’s northeastern region.
It says the measure is needed for two main reasons: to allow Turkish troops to combat the Kurdish People’s Protection Units (YPG) armed group – the main component of the SDF – and create the conditions needed for the return of Syrian refugees.
The PKK has waged a decades-long armed campaign for autonomy in Turkey. It has been designated a “terrorist” organisation by Turkey, the US and the European Union.
“We believe it’s in the interest of Syria’s territorial integrity and in the Syrian people, as well as Turkey’s national interest, to establish this safe zone, because that area has become, over the last two, three years, a safe haven for PKK terrorists,” Ibrahim Kalin, a spokesman for the Turkish presidency, told Al Jazeera on Monday.
Ankara also sees the “safe zone” as a space inside Syria where some two million of the more than 3.6 million refugees currently residing in Turkey can be returned to.
Turkey’s hosting of the refugees has increasingly become a political flashpoint in the country, which is mired in a major economic slump.
How far could Turkey go?
Syria’s northeastern border region with Turkey stretches 480km (300 miles) from the Euphrates River in the west to the border with Iraq in the east. The area is currently controlled by the SDF.
Turkey is yet to reveal the exact scope of its planned incursion. It had previously suggested it would carry out military operations east of the Euphrates, prior to agreeing in early August on the so-called “safe zone” plan with the US, under which Kurdish forces would be pulled back from the Turkey-Syria border.
For now, Ankara’s plans could focus on a stretch of territory about 100km (60 miles) wide along the border, between the towns of Ras al-Ain and Tel Abyad, from where the YPG withdrew in late August.
On Monday, a US official told Reuters News Agency that US forces had already pulled out from border posts in the thinly populated area, which has historically had a strong Arab presence.
Turkish President Recep Tayyip Erdogan has also suggested pushing deeper beyond the proposed “safe zone” to the Syrian cities of Raqqa and Deir Az Zor, potentially allowing for a greater number of Syrian refugees to be returned from Turkey.
What does this mean for Syria’s Kurds?
The SDF spearheaded the US-led campaign that defeated ISIL in Syria earlier this year.
But the US’s decision to withdraw its approximately 1,000 troops stationed in Syria has left the 60,000-strong force increasingly isolated and now seemingly locked in Ankara’s sights.
The SDF on Monday called Washington’s move “a stab in the back” but it pledged to “defend our land at all costs” despite the departure of its one-time backer’s forces.
US President Donald Trump last year called the Syrian Kurds “great fighters” and heralded the sacrifices they had made in the fight against ISIL.
“We are trying to help them a lot. Don’t forget that’s their territory. They fought with us, they died with us, we lost tens of thousands of Kurds fighting ISIS. They’re great people and we have not forgotten,” Trump told reporters in September 2018.
But on Monday, Trump said the Kurdish forces were “paid massive amounts of money and equipment” to ally with the US in the fight against ISIL and warned they would now have to “figure out the situation … in their neighbourhood” alongside other actors, including Turkey, Syria, Iran and Iraq.
Yerevan Saeed, an analyst at the Erbil-based Middle East Research Institute think-tank, said Washington’s move could prompt the SDF to side with US rivals Russia and Iran, the two main military military backers of Syrian President Bashar al-Assad.
“Abandoning the Kurds at this moment is the complete opposite of maximum pressure on Iran since such an abandonment will only push the Kurds into Tehran’s orbit,” Saeed told Al Jazeera, referring to Trump’s decision to reimpose sanctions on Iran in an effort to curb its ballistic missiles programme as well as its support for regional armed groups.
What will happen to jailed suspected ISIL fighters?
Washington has said Turkey will be responsible for all suspected ISIL fighters captured during the battle against the armed group. The SDF is currently holding 12,000 such individuals – some of whom are foreign nationals – in several detention facilities spread across northern Syria, as well as some 58,000 family members, according to reports.
“We will not tolerate Daesh to come back in any form or shape, whether in Syria, Iraq or somewhere else,” Kalin, the Turkish spokesman, told Al Jazeera, using an Arabic acronym for ISIL. “But let’s remember, this is not one country’s responsibility. It is the international community’s responsibility.”
But Saeed warned any Turkish incursion could result in the Kurds releasing the imprisoned suspected fighters in order to allow the armed group to “reroute their forces to the northeastern border to fight and stop” the Turkish forces.
“Daesh is still a real threat not just in Syria but in Iraq too. Freeing these prisoners is likely to make an ISIS comeback in both Iraq and Syria and reverse the US gains against the group,” he added.
The SDF’s political wing meanwhile cautioned on Monday that the suspected ISIL fighters could become a “great danger” for the region, saying the situation over their continued detention was “not clear”. The SDF has repeatedly called on foreign states to take responsibility for their nationals in its prisons.
What has the reaction been?
Trump on Monday warned Turkey against overreach in northern Syria, threatening to “destroy and obliterate” its economy if Ankara went “off-limits”.
As I have stated strongly before, and just to reiterate, if Turkey does anything that I, in my great and unmatched wisdom, consider to be off limits, I will totally destroy and obliterate the Economy of Turkey (I’ve done before!). They must, with Europe and others, watch over…
— Donald J. Trump (@realDonaldTrump) October 7, 2019
US defence officials, meanwhile, also made clear that Washington does not support Turkey’s planned offensive.
“The Department of Defense made clear to Turkey – as did the President – that we do not endorse a Turkish operation in Northern Syria,” Pentagon spokesman Jonathan Hoffman said in a statement on Monday. “The US Armed Forces will not support, or be involved in any such operation,” he added.
For its part, the United Nations said it was “preparing for the worst” and expressed alarm over Turkey’s “safe zone” plan.
“The safe zone concept is one that we have a bitter history [with] and actually we never promote or encourage,” said Panos Moumtzis, the UN’s regional humanitarian coordinator for the Syria crisis.
“We don’t think it is something that had worked for the United Nations, keeping in mind Srebrenica and what had happened in the past,” he added, referring to the killing by Serbian troops of some 8,000 Bosniak men and boys in 1995 in a UN-declared “safe zone”.
The EU also issued a cautionary statement, warning Turkey’s anticipated incursion would “exacerbate civilian suffering”, cause a “massive displacement” of people and undermine political efforts aimed at finding a solution to Syria’s devastating eight-year-long war.
Syria and Russia meanwhile called for the country’s territorial integrity to be preserved.
Kremlin spokesman Dmitry Peskov said on Monday that all foreign military forces “with illegal presence” should leave Syria, while Iranian Foreign Minister Mohammad Javad Zarif said peace in the country would only be achieved through “respect for its territorial integrity”.
US is an irrelevant occupier in Syria—futile to seek its permission or rely on it for security.
Achieving peace & fighting terror in Syria will only succeed thru respect for its territorial integrity & its people.
Adana provides framework for Turkey & Syria—Iran ready to help.
— Javad Zarif (@JZarif) October 7, 2019
Amid the global reaction, international aid organisation Save the Children urged international powers to take “urgent steps” to ensure the safety of civilians in the region.
“We are deeply concerned for the hundreds of thousands of people present in northeast Syria,” Sonia Khush, Save the Children’s Syria response director, said in a statement sent to Al Jazeera.
“All essential services including food, water, shelter, health, education, and protection must be consistently provided to all civilians, or we could see another humanitarian disaster unfold before our eyes.”