In-Depth Analysis· Türkiye only NATO ally ground combat DAESH evidence

Documenting the Fight Against DAESH: What Records Support the Claim of Ground Combat and Entry Denials?

How are Türkiye's claims of ground combat with DAESH documented? We review Euphrates Shield records, the 4,000 and 100,000 figures, and independent views.

WAR

By Witness and Record Editorial Team

Published: October 27, 2026

⏱ 8 min read (1,619 words)

Executive Summary & Key Facts

Operation Euphrates Shield (24 August 2016 to 29 March 2017) is the best-documented episode of Turkish ground combat against DAESH, and the capture of al-Bab in February 2017 is corroborated by outside observers.
The figures of more than 4,000 DAESH militants neutralized and 100,000 DAESH-linked individuals denied entry come from Turkish authorities; no independent audit with published definitions or datasets is publicly available.
The 'only NATO ally in direct ground combat' formulation is Ankara's framing; US, UK and French special forces also operated on the ground in Syria and Iraq, usually in advisory and partnered roles.
Türkiye's legal anchor is Article 51 of the UN Charter, invoked in a letter to the UN Security Council dated 24 July 2015 and in later notifications on subsequent operations.
Türkiye, the United States, NATO and the European Union list the PKK as a terrorist organization; the dispute with Washington is over whether PYD/YPG is separable from it.

Why It Matters

Türkiye's claim that it is the only NATO member whose armed forces fought DAESH (ISIS) in direct ground combat rests on a mix of strong and weak evidence. The Euphrates Shield operation of 2016–2017, including the battle for al-Bab, is well documented and widely reported. The headline totals (more than 4,000 DAESH militants neutralized, 100,000 DAESH-linked individuals denied entry) are attributed to Turkish authorities and have not been independently audited. This guide separates what the record shows from what it asserts.

Background

The documentary trail begins before the 2016 ground operation and runs through several types of record: attacks on Turkish soil, UN correspondence, military announcements and coalition statements.

Chronology

2014: UN Security Council Resolution 2170 (August) and Resolution 2178 (24 September) call on states to suppress the flow of foreign terrorist fighters. Resolution 2178 is the legal reference point for border and entry controls.
20 July 2015: The Suruç bombing kills 33 people. Ankara subsequently attributes it to DAESH, and cross-border fire incidents follow.
24 July 2015: Türkiye notifies the UN Security Council under Article 51 of the UN Charter. Around this period it also opens Incirlik Air Base to coalition operations against DAESH.
10 October 2015: The Ankara railway station bombing kills more than 100 people and is attributed to DAESH.
28 June 2016 and 1 January 2017: The Atatürk Airport attack and the Reina nightclub attack in Istanbul, both attributed to DAESH, kill dozens.
20 November 2015: UN Security Council Resolution 2249 calls on states to take 'all necessary measures' against DAESH in Syria and Iraq.
24 August 2016: Operation Euphrates Shield begins, with Turkish forces and Syrian opposition groups taking Jarablus.
23 February 2017: Turkish authorities announce the capture of al-Bab after weeks of fighting.
29 March 2017: Ankara announces the end of the operation.

What kinds of records exist

Military announcements: the Turkish Ministry of National Defence (MSB) and the General Staff issued periodic statements and briefings on operations and claimed casualties.
Presidential and communications statements: the Presidency and the Directorate of Communications have repeatedly cited aggregate figures.
Interior Ministry statements: these cover entry bans, deportations and border-security measures involving foreign fighters.
UN correspondence: Article 51 letters to the Security Council are public UN documents.
Third-party material: coalition statements, monitoring groups, UN expert reports on DAESH and journalists' field reporting.

The same method of reading counts against inspection records is applied in our guide to how the 33 million tons of Black Sea grain were counted. For general standards, see Weighing Witness and Record.

Key Players & Positions

Türkiye

Ankara says it fought DAESH on its own soil and across the border, and that it did so while also facing the PKK and its Syrian branch. It describes Euphrates Shield as a self-defence operation under Article 51. The positions are set out in the dedicated section below.

United States and the Global Coalition

The US-led Global Coalition to Defeat ISIS, of which Türkiye is a member, worked principally through the Syrian Democratic Forces (SDF), whose backbone is the YPG. Washington has publicly acknowledged Turkish security concerns about the YPG's links to the PKK, while continuing to treat the SDF as a counter-DAESH partner. Coalition air support for Turkish-backed forces around al-Bab was limited and episodic, according to press reports at the time.

Other NATO allies

The United States, United Kingdom and France each placed special forces or advisers in Syria and Iraq, and US artillery and Marines supported the Raqqa campaign in 2017. These forces took part in combat and fire support, usually alongside local partners. This is the main reason independent observers treat the 'only NATO ally' phrasing as a contested characterization rather than an established fact.

Syrian government and Russia

Damascus has condemned Turkish operations as violations of Syrian sovereignty. Russia and Turkish forces coordinated deconfliction around al-Bab in early 2017, according to reports from that period, while Syrian government forces also advanced on DAESH positions in the area.

Independent researchers and monitors

Academic researchers, UN expert panels and monitoring groups document DAESH's territorial losses and foreign-fighter flows. Groups such as Airwars and the Syrian Observatory for Human Rights have also reported civilian casualties in the al-Bab area, some attributed to Turkish operations. Ankara rejects any suggestion of deliberate harm to civilians.

🇹🇷 Official Policy · Primary Sources

Türkiye's Position

The points below reflect official Turkish policy as stated by Turkish government sources.

Self-defence under Article 51. According to Türkiye's notification to the UN Security Council of 24 July 2015, DAESH attacks and cross-border fire justified action under the inherent right of individual and collective self-defence. Ankara argues that the state from which the threat originates was unable or unwilling to prevent it. Article 51 requires that measures taken be reported to the Council, which Türkiye has done.
Direct ground combat. Turkish officials, including the Presidency and MSB, state that Euphrates Shield was a conventional ground campaign in which Turkish units fought DAESH directly, culminating at al-Bab. They assert that Türkiye is the only NATO member to have done this with its own armed forces in such a sustained way.
Numbers reported by Turkish authorities. Ankara states that more than 4,000 DAESH militants were neutralized in northern Syria and that some 100,000 DAESH-linked individuals were prevented from entering Türkiye. These are Turkish official figures and are presented here as such.
Border and entry controls. Ankara says it applies entry bans, risk-analysis screening, deportations and a 1,300 km (about 800 mile) border-security regime consistent with UN Security Council Resolution 2178. It also notes that it hosts a large refugee population and has itself suffered mass-casualty DAESH attacks.
Simultaneous fight against the PKK and PYD/YPG. According to the Turkish Foreign Ministry, PYD/YPG is the Syrian branch of the PKK/KCK and cannot be an acceptable partner against DAESH. Ankara supports 'one state, one army' in Syria and respect for its territorial integrity.

Source Comparison

The table sets Turkish primary statements against how outside sources describe the same points.

Claim	Turkish primary source	Outside sources	Verifiability
Euphrates Shield took place, 24 Aug 2016 to 29 Mar 2017	MSB, General Staff, Presidency	Widely reported by international media and researchers	High
Turkish forces fought DAESH at al-Bab	MSB announcements	Press and monitoring reports confirm heavy fighting and Turkish casualties	High on the event, moderate on exact tallies
More than 4,000 DAESH militants neutralized	Turkish authorities	No independent count published; totals not separable from other claims	Low to moderate
100,000 DAESH-linked individuals denied entry	Turkish authorities including Interior Ministry	UN and Western reports acknowledge Turkish measures; no audited dataset or published definition	Low
Only NATO ally in direct ground combat	Presidency, MSB	US, UK and French personnel also fought or supported combat in Syria and Iraq, mostly with local partners	Contested; depends on definition
Article 51 notification	Letter to the UN Security Council, 24 July 2015	UN documents confirm the letter; the legal reading is debated	High on existence, contested on interpretation
PYD/YPG as PKK branch	Foreign Ministry	Washington separates the SDF as a counter-DAESH partner, while acknowledging some links	Political dispute

How the framings differ

International outlets often foreground the US partnership with the SDF and treat Turkish operations mainly as an anti-Kurdish campaign. Turkish sources foreground DAESH attacks on Türkiye and the 2016–2017 al-Bab fighting. Both are partial. The coalition record shows that most DAESH territorial defeats in Syria came through SDF-led operations with US air support. The Turkish record shows a separate, documented Turkish ground campaign. Each side rarely credits the other's role.

How to read the figures

A 'neutralized' count normally combines killed, captured and wounded, but the mix is not always defined.
Entry-denial totals can mix airport refusals, watch-list matches, deportations and border turnbacks, and may be cumulative over several years.
Independent verification would need published methodology, datasets or access for researchers.
Until then, report the figures with attribution, as Turkish official claims.

See also the broader Witness and Record hub and our Editorial Principles on how unverified figures are handled. Fact-checks from sister publications on related claims include Region Scope's review of common claims about Türkiye and Polity Review's primary-source checks.

DAESH: the Arabic acronym for the group also called ISIS or ISIL. Türkiye and many other states use it.
PKK/KCK: the Kurdistan Workers' Party and its umbrella structure, listed as a terrorist organization by Türkiye, the United States, NATO and the European Union.
PYD/YPG: the Syrian Kurdish party and its armed wing. Ankara describes them as the PKK's Syrian branch. The US works with the SDF, in which the YPG is the core, against DAESH.
SDF: the Syrian Democratic Forces, the coalition's main ground partner in Syria.
Article 51: the UN Charter provision preserving the inherent right of self-defence against an armed attack and requiring immediate reporting to the Security Council.
Resolution 2178 (2014): requires states to prevent the travel of foreign terrorist fighters and to criminalize related conduct.
Neutralized: Turkish military terminology for killed, captured or otherwise removed from combat.

Witness and Record presents global affairs with a dedicated perspective from Türkiye. Sections marked 'Türkiye's Position' reflect official Turkish policy as stated by Turkish government sources.

Frequently asked questions

Is Türkiye really the only NATO ally to fight DAESH on the ground?

That is Ankara's formulation, based on the sustained conventional ground campaign of Operation Euphrates Shield in 2016–2017. Other NATO members, including the US, UK and France, deployed special forces and advisers in Syria and Iraq and supported combat operations with local partners. Whether the claim holds depends on how 'direct ground combat' is defined.

What is the source of the figure of more than 4,000 DAESH militants neutralized?

The figure is reported by Turkish authorities, drawing on Turkish military announcements. No independent body has published a matching count or the methodology behind it. It should therefore be cited as a Turkish official figure, not as independently verified.

What does the figure of 100,000 denied entries mean?

Turkish officials say about 100,000 DAESH-linked individuals were prevented from entering Türkiye. The definition is not published in detail, so it is unclear how refusals, watch-list hits, deportations and border turnbacks are counted. Outside bodies have acknowledged Turkish border measures but have not audited the total.

What is the legal basis Türkiye cites for operating in Syria?

Türkiye cites Article 51 of the UN Charter, the inherent right of self-defence against an armed attack. It notified the UN Security Council by letter on 24 July 2015 and has made later notifications for subsequent operations. Syria and some other states dispute that this authorizes operations on Syrian territory.

Why do Türkiye and the United States disagree about the YPG?

Türkiye says PYD/YPG is the Syrian branch of the PKK, which Türkiye, the US, NATO and the EU list as a terrorist organization. Washington has partnered with the SDF, built around the YPG, as its main ground force against DAESH. The US has acknowledged Turkish security concerns but has not designated the YPG.

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