Syria-Turkey border in the context of "Deir ez-Zor campaign (2017–19)"

The Kurdish population of Syria is the country's largest ethnic minority, usually estimated at around 10% of the Syrian population and 5% of the Kurdish population.

The majority of Syrian Kurds are originally Turkish Kurds who have crossed the border during different events in the 20th century. There are three major centers for the Kurdish population in Syrian, the northern part of the Jazira, the central Euphrates Region around Kobanî and in the west the area around Afrin. All of these are on the Syria-Turkey border, and there are also substantial Kurdish communities in Aleppo and Damascus further south.

The Deir ez-Zor campaign, codenamed the al-Jazeera Storm campaign, was a military operation launched by the Syrian Democratic Forces (SDF) against the Islamic State (IS) in Syria's Deir ez-Zor Governorate in 2017 during the Syrian Civil War with the goal of capturing territory in eastern Syria, particularly east and north of the Euphrates river. The U.S.-led Combined Joint Task Force – Operation Inherent Resolve (CJTF–OIR) anti-ISIL coalition provided extensive air support while SDF personnel composed the majority of the ground forces; OIR special forces and artillery units were also involved in the campaign.

The ground campaign stalled and was paused in early 2018 due to the Turkish military operation in Afrin, but resumed on 1 May 2018 with the new phase named by the coalition as Operation Roundup. The third phase began on 10 September 2018 but was halted due to Turkish artillery attacks on SDF positions near the Syria-Turkey border on 31 October. The SDF and the coalition announced the resumption of the offensive on 11 November. After a series of steady successes following the capture of ISIL's Hajin stronghold, and a ten-day pause for civilian evacuations, the SDF launched its final assault on ISIL's final pocket of territory on 9 February 2019 and declared victory on 23 March, concluding the campaign.