An overview of US involvement in Syria's civil war over the years

Published December 20, 2018
Syrian pro-government forces walk in Aleppo's Bustan al-Qasr neighbourhood after they captured the area in the eastern part of the war torn city on December 13, 2016.
— File
Syrian pro-government forces walk in Aleppo's Bustan al-Qasr neighbourhood after they captured the area in the eastern part of the war torn city on December 13, 2016. — File

As US President Donald Trump announced an order to pull American ground forces from the war-ravaged Syria on Wednesday, here's a look at US involvement in Syria since the forces first engaged in the conflict in 2014:

How it started

In September 2014, then-President Barack Obama launched a US air campaign against the Islamic State in Syria, one month after starting airstrikes in neighbouring Iraq.

The Islamic State had built substantial military firepower in Syria, which it used to sweep across western and northern Iraq earlier in 2014.

In late 2015 the first American ground troops entered Syria initially 50, growing to the current official total of about 2,000.

They recruited, organised and advised thousands of Syrian Kurdish and Arab fighters, dubbed the Syrian Democratic Forces, and pushed IS out of most of its strongholds.

Military operations

To date, the US-led coalition has launched airstrikes on at least 17,000 locations in Syria since the start of the operation. Last week, there were strikes on 208 locations, largely on Islamic State fighters and facilities in the Middle Euphrates River Valley, according to the US military.

Thousands of IS fighters have been killed or captured, but US military officials say there are still as many at 2,000 insurgents still in the MERV, and a number of others who have escaped to various locations around the country.


Russia joined the big-power entanglement in Syria in the fall of 2015.

Moscow said it was there to defeat terrorists, but Washington objected, saying the Russian military was propping up Syrian President Bashar Assad and making it more difficult to eliminate IS.

To avoid aerial confrontations and accidents, US and Russian military officials set up a telephone “deconfliction line,” which remains in effect.

Turkey's concern about links between the US-supported Syrian Kurdish militias and Kurdish insurgents inside Turkey added a further complication for Washington.

The Turkish military intervened in northern Syria, prompting the Syrian Kurds to temporarily abandon the fight against IS.

Iran has also maintained a presence in the country, supporting Assad and supplying weapons, the US has asserted.

The US pullout

President Donald Trump said his administration had continued the Syria fight only because of the IS threat. On Wednesday the president tweeted, “We have defeated ISIS in Syria,” and later US officials said he had ordered a full withdrawal of US forces there.

The Pentagon said in a prepared statement that IS-held territory had been “liberated,” but added that the U.S. would continue “working with our partners and allies to defeat ISIS wherever it operates.”

Officials refused to say when all US troops would be out of Syria.

Reaction to the decision:

  • Opponents

The decision has been met with widespread condemnation and only a smattering of support.

Pentagon leaders were largely mum on Wednesday, adhering to the mandate that US civilian leaders make policy and the military salutes and moves forward.

But top defence officials have been blunt in recent assessments that the fight against the Islamic State is not over.

Brett McGurk, the administration's envoy for the fight against IS, said on December 11:

“It would be reckless if we were just to say, well, the physical caliphate is defeated, so we can just leave now. I think anyone who's looked at a conflict like this would agree with that.”

Senator Marco Rubio, a Florida Republican, called the pullout “catastrophic,” and Senator Lindsey Graham deemed it a “disaster in the making.”

Senator Jeanne Shaheen said an ill-informed and hasty withdrawal may breathe new life into ISIS and other insurgent groups, and “will also cede America's hard-fought gains in the region to Russia, Iran and Assad.”

  • Supporters

Senator Rand Paul said he was “very supportive” of the decision:

“For the first time in my lifetime we have a president with the courage to declare victory and bring the troops home. We haven't had a president in 20 or 30 years who can figure out how to declare victory,” he said.

Senator Bill Cassidy said Americans don't want troops in Syria in perpetuity. “We brought them there to crush ISIS. We've crushed ISIS. We have troops in Iraq who can spring over there (to Syria) to do something” if needed.


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