Syrian Democratic Forces (SDF)
The Kurdish-led, multi-ethnic force that defeated the ISIS caliphate — commanded by Mazloum Abdi, integrating into the Ministry of Defence under the January 2026 agreement as three divisions and two specialised brigades. Structural level only.
Broad area of activity
Concentrated toward Hasakah province and the upper Jazira since January 2026; formerly across the northeast. National-scale description only.
Notable history
Formed October 2015 around the YPG with Arab, Assyrian and other components as the coalition's ground force against ISIS: Manbij, Raqqa, the Euphrates valley, Baghouz. Administered a third of Syria at peak. Weathered Turkish operations in 2018 and 2019, lost its Arab-majority territories in the January 2026 fighting amid tribal defections, and signed the US-brokered integration agreement on 30 January 2026.
Strengths
Combat experience against ISIS unmatched in Syria; disciplined command; the counter-terrorism and women's formations entering the MoD intact; administrative depth behind it.
Limitations
Lost territorial and revenue base; Turkish hostility constrains every arrangement; Arab component loyalty proved conditional in January 2026; integration dilutes autonomous command by design.
Subordinate & associated
Documented equipment
Lineage & institutional history
Formal parent institution: Integrating under Syrian Ministry of Defence command per the 30 January 2026 agreement — implementation ongoing, so the final command relationship is not yet an established fact; autonomous under coalition partnership 2015–2026.
Related locations
Kobani / Ayn al-Arab: The 2014–15 defence, conducted by the YPG core later folded into the SDF. Raqqa: The 2017 campaign that took the city from ISIS.
Key events
The Syrian Democratic Forces are formed
The YPG and allied Arab, Assyrian and other factions announce the Syrian Democratic Forces — a US-backed umbrella built to take the caliphate down, Kurdish-led but multi-ethnic by design, commanded by Mazloum Abdi.
The fall of Raqqa
The SDF, with coalition air power, takes the caliphate's Syrian capital after a four-month battle that destroys much of the city and displaces its population. ISIS's remaining territory shrinks to the Euphrates valley.
The territorial caliphate ends at Baghouz
The SDF takes the last ISIS-held village on the Euphrates; the territorial caliphate ends, leaving an insurgency in the desert, and tens of thousands of fighters and family members in SDF-run prisons and the al-Hol and Roj camps.
The January 2026 northeast fighting
After integration talks end without breakthrough, fighting erupts in Aleppo and spreads across the north and east; government forces and allied factions take Raqqa and Deir ez-Zor as Arab tribal components defect from the SDF, which withdraws toward Hasakah and Qamishli. Reported casualties run into the hundreds; each side blames the other for the collapse of the talks.