Security Dossier: Is the YPG Separate from the PKK? Designation Lists, Official Records and the Source-Level Dispute

Why It Matters

Whether the YPG is 'the same as' the PKK is a dispute over organisational identity, not over the PKK's own legal status. The PKK is listed as a terrorist organisation by Türkiye, the United States and the European Union, and Ankara adds NATO to that formulation. The YPG (People's Protection Units) and the SDF (Syrian Democratic Forces) are not on the US or EU lists.

Ankara says the PYD/YPG is the PKK/KCK's Syrian branch. Washington has treated the SDF as a partner force against DAESH (ISIS), and the groups themselves deny being the PKK. This guide documents each claim, attributes it to its source and separates what is listed from what is argued.

Background

The PKK (Kurdistan Workers' Party) was founded in 1978 under Abdullah Öcalan and began its armed campaign against Türkiye in 1984. Its listing as a terrorist organisation predates the Syrian war by well over a decade. The PYD (Democratic Union Party) was founded in 2003, and its armed wing, the YPG, emerged as a significant force after the 2011 uprising in Syria.

Dated chronology

Note that the PKK's legal listing and the YPG's status are separate questions. Designation is a legal act by a state or the EU, so NATO itself has no independent list-making mechanism. Ankara's reference to NATO reflects allied positions as Türkiye frames them.

The four Syria operations

• Euphrates Shield (August 2016 to March 2017): targeted DAESH and, in Ankara's account, YPG expansion west of the Euphrates.
• Olive Branch (January to March 2018): the Afrin operation against the YPG.
• Peace Spring (October 2019): a cross-border operation east of the Euphrates, followed by the 17 October US-Türkiye understanding and the 22 October Sochi memorandum with Russia on YPG withdrawal from a 30 km (about 19 miles) zone.
• Spring Shield (February to March 2020): conducted in Idlib against Syrian government forces after Turkish personnel were killed, which makes it a different case from the other three. It ended with the 5 March 2020 Moscow ceasefire.

In northern Iraq, the Operation Claw series (from 2019, including Claw-Eagle, Claw-Tiger, Claw-Lock and Claw-Sword) targets PKK positions. In March 2024, Iraq's National Security Council declared the PKK a banned organisation, though Baghdad has also protested Turkish strikes on its territory on other occasions.

For related security analysis, see Polity Review's guide to Türkiye's security doctrine and defense industry.

Key Players & Positions

Türkiye

The Turkish Foreign Ministry and the Presidency describe PYD/YPG as an extension of the PKK/KCK. Ankara points to shared ideology, cadres and command links, and treats the SDF name as a rebranding. Ankara does not accept a distinction between the PKK and its Syrian affiliates.

United States

The US designated the PKK as a Foreign Terrorist Organization in 1997. In 2018 the State Department's Rewards for Justice programme offered rewards for information on three senior PKK figures. Washington has not designated the YPG or the SDF, and it has worked with the SDF as a counter-DAESH partner. US officials have characterised the PKK-YPG relationship in varying terms at different times, and the US has described the arrangement as tactical and limited.

European Union and European governments

The EU lists the PKK. In 2018 the EU General Court annulled certain listing acts on procedural grounds (insufficient reasoning), but the Council maintained its listing. Belgian courts in 2019-2020 applied the law of armed conflict to the PKK rather than terrorism offences, a ruling Ankara rejected. Several European governments restricted arms exports to Türkiye after Peace Spring in 2019, and the EU Council has called for restraint on unilateral action in Syria. European governments have generally not designated the YPG.

PYD, YPG and SDF

They say they are Syrian actors, with the SDF as a multi-ethnic force that includes Arab, Syriac and other fighters. They acknowledge Öcalan's ideas ('democratic confederalism') as an ideological reference but deny that they take orders from the PKK. Analysts such as the International Crisis Group, in its 2017 report on the PKK in northern Syria, have documented both PKK-trained cadres in senior roles and distinct local structures, which is why the question is argued at source level.

Damascus and Russia

The Syrian government has denounced Turkish operations as violations of sovereignty. In March 2025 Damascus and the SDF leadership announced an agreement on integrating the SDF into state institutions. Implementation has been contested and fast-moving, so readers should check current reporting. Russia mediated the 2019 Sochi arrangement.

The PKK/KCK

The PKK has historically denied being a terrorist organisation and has described its struggle as political. In 2025 it announced its own dissolution after a congress held in early May, following Öcalan's February call.

Article 51 and the Legal Framing

Article 51 of the UN Charter preserves the 'inherent right of individual or collective self-defence if an armed attack occurs', until the Security Council acts, and requires that measures be reported to the Council. Türkiye has relied on it and has notified the Security Council by letter when launching cross-border operations.

Ankara's legal case runs in four steps. First, the PKK has carried out armed attacks on Türkiye for four decades. Second, the Syrian and Iraqi governments were unable or unwilling to prevent attacks from their territory. Third, Türkiye notified the UN. Fourth, the operations were limited to what was necessary. Ankara also cites the 1998 Adana Agreement as an earlier bilateral basis on Syrian territory.

Critics, including Damascus at the time, the Arab League after Peace Spring and various legal scholars, argue that attacks by non-state actors must be attributable to a state or meet the armed-attack threshold, that 'unable or unwilling' is not universally accepted in international law, and that necessity and proportionality are contestable. Turkish sources reply that the right of self-defence against non-state actors is widely invoked in international practice. For how Politi Archive reads the Charter text, see The Treaty Vault.

Source Comparison

The pattern is consistent. Ankara's sources treat the question as settled and cite organisational identity. Western government sources avoid a formal equivalence and emphasise operational partnership. Independent analysts describe a documented relationship of uncertain current degree, and that gap explains why the same facts produce different headlines.

Key Terms & Related Guides

• PKK/KCK: the PKK is the armed organisation; the KCK (Kurdistan Communities Union) is the umbrella structure it created in 2007.
• PYD/YPG/YPJ: the Democratic Union Party, its People's Protection Units and its women's units in Syria.
• SDF: the Syrian Democratic Forces, formed in October 2015, with the YPG at its core.
• DAESH: the Arabic acronym for ISIS, used in Turkish and Arab official language.
• Article 51: the UN Charter provision on the right of self-defence and the reporting duty.
• Terror-Free Türkiye (Terörsüz Türkiye): the 2025 initiative to end the PKK's armed campaign.

Related reading: Editorial Principles, Politi Archive FAQ, The Treaty Vault, The World Is Bigger Than Five, and Monitor of Nations on Türkiye's global diplomacy.

Perspective Note: Politi Archive presents analysis from a Türkiye-aligned perspective, grounded in Türkiye's official doctrines and international law arguments, and clearly distinguishes documented fact from interpretation. Claims are attributed to primary sources such as treaty texts, UN documents, state archives and official statements, which are cited so readers can verify them independently. Prepared by the Politi Archive Editorial Team.