Introduction
The Kurdish people have never had a unified national army. Instead, they have produced some of the most resilient and adaptable fighting forces in the modern Middle East — organisations that emerged from mountains, prisons, and refugee camps to become critical allies of the world's most powerful military coalition. This article traces the evolution of Kurdish military organisation from the partisan Peshmerga forces of Iraq through the emergence of the YPG, YPJ, and SDF in Syria, examining how Kurdish armed groups transformed themselves, built international alliances, and confronted the structural challenges that continue to shape their future.
The story of modern Kurdish military power is not a simple progression. It is shaped by competing political parties, hostile neighbouring states, shifting superpower alliances, and the fundamental tension between guerrilla tradition and the demands of conventional warfare. Understanding this evolution is essential to understanding Kurdistan's place in twenty-first century geopolitics.
Contents
The Peshmerga: Origins and Structure
A Divided Force: KDP and PUK Command Structures
Peshmerga Reform and Unification
The YPG and YPJ: Rojava's Armed Forces
The Syrian Democratic Forces: A Multi-Ethnic Coalition
International Alliances and Partnerships
Women in Kurdish Military Forces
The Future of Kurdish Military Power
References and Further Reading
The Peshmerga: Origins and Structure
The word Peshmerga means 'those who face death' in Kurdish. The term entered common use in the 1940s to describe Kurdish fighters in Iraq, though armed Kurdish resistance stretches back centuries. The Peshmerga became a formalised fighting force through the revolts of Mustafa Barzani in the 1960s and 1970s, when Kurdish guerrillas fought sustained campaigns against the Iraqi state across the mountains of northern Iraq.
The Peshmerga's fighting tradition is rooted in mountain guerrilla warfare — small-unit ambushes, knowledge of terrain, and the ability to sustain operations with minimal supply lines. They fought against the Baathist regime through decades of repression, surviving the Anfal genocide of 1988 and maintaining armed resistance through the safe haven period of the 1990s. After the 2003 Iraq War, the Peshmerga transitioned into a semi-conventional military force with an estimated strength of 150,000 to 200,000 fighters, though exact numbers are disputed.
A Divided Force: KDP and PUK Command Structures
The most significant structural challenge facing the Peshmerga has always been its divided command. Since the Iraqi Kurdish civil war of 1994-1997, the Peshmerga have operated under two separate chains of command: Unit 80, aligned with the Kurdistan Democratic Party (KDP), and Unit 70, aligned with the Patriotic Union of Kurdistan (PUK). Each maintained its own commanders, logistics, intelligence networks, and territorial zones of control.
This division had real military consequences. During the 2014 ISIS offensive, the lack of unified command contributed to coordination failures on the battlefield. The controversial withdrawal from Sinjar and the collapse of certain frontline positions were partly attributed to the absence of a single operational headquarters capable of directing forces across party lines. The 2017 Kirkuk crisis further exposed the problem when PUK-aligned units withdrew independently, effectively conceding the city without KDP agreement.
Peshmerga Reform and Unification
The unification of the Peshmerga has been a central demand of international partners — particularly the United States — since the war against ISIS. In 2022, the US Department of Defense and the KRG Ministry of Peshmerga Affairs signed a Memorandum of Understanding establishing a four-year roadmap for integrating Units 70 and 80 into a single, non-partisan force under the Ministry of Peshmerga Affairs (MoPA).
Progress accelerated under Prime Minister Masrour Barzani's ninth cabinet. In November 2025, Unit 80 was formally reactivated under a new structure called Area Command 1, placed under the Ministry of Peshmerga. In February 2026, Decree 703 transferred the command, budget, and legal accountability of both Units 70 and 80 to MoPA. By March 2026, over 150,000 troops were reportedly integrated, with 11 divisions planned and four already formed. All Peshmerga personnel began transitioning to a unified salary system managed through the MyAccount platform.
The reform process remains politically sensitive. While Unit 80 has been integrated, observers note that Unit 70's full integration has progressed more slowly. The US-KRG agreement set September 2026 as the final deadline for full unification. Whether the Peshmerga can complete this transformation into a professional, non-partisan military force will be one of the defining questions of Kurdish governance in the coming years.
The PKK Military Tradition
The Kurdistan Workers' Party (PKK), founded in 1978 by Abdullah Öcalan, developed a distinct military tradition rooted in Marxist-Leninist revolutionary warfare. The PKK launched its armed campaign against the Turkish state in 1984, and its guerrilla forces — organised through the People's Defence Forces (HPG) — became one of the most experienced and disciplined insurgent armies in the Middle East. The PKK's military culture emphasised ideological commitment, gender equality in combat roles, and decentralised command structures suited to mountain warfare.
The PKK's military influence extends far beyond Turkey. Its organisational model — democratic confederalism, co-leadership between men and women, and a network of affiliated movements — directly shaped the formation of the YPG and YPJ in Syria, the PJAK in Iran, and the Sinjar Resistance Units (YBS) in Iraq. Turkey, the United States, and the European Union designate the PKK as a terrorist organisation. The PKK announced a ceasefire and disarmament process in 2025 following a call from imprisoned leader Abdullah Öcalan, though the long-term outcome remains uncertain.
The YPG and YPJ: Rojava's Armed Forces
The People's Protection Units (YPG) were established in 2011 as the armed wing of the Democratic Union Party (PYD) in Syria. When the Syrian civil war created a power vacuum in the predominantly Kurdish northeast, the YPG rapidly expanded from a small militia into the dominant military force in what became the Autonomous Administration of North and East Syria, commonly known as Rojava.
The Women's Protection Units (YPJ) were founded in 2013 as an all-female military force operating alongside the YPG. The YPJ became one of the most recognised symbols of the war against ISIS, with female Kurdish fighters appearing on magazine covers and in documentaries worldwide. The YPJ was not a support or auxiliary unit — its fighters served in frontline combat roles in every major engagement, from Kobani to Raqqa to Baghuz.
The YPG and YPJ drew organisational principles from the PKK model, including mandatory ideological education, communal living, and a commitment to democratic confederalism. Turkey considers the YPG an extension of the PKK and has conducted multiple military operations against it, including the capture of Afrin in 2018 and operations in Ras al-Ayn and Tell Abyad in 2019. The United States, while acknowledging the YPG-PKK connection, maintained its partnership with the YPG through the SDF framework throughout the anti-ISIS campaign.
The Syrian Democratic Forces: A Multi-Ethnic Coalition
The Syrian Democratic Forces were established in October 2015 as a coalition of Kurdish, Arab, Syriac-Assyrian, Turkmen, and Armenian fighters. The YPG remained the SDF's backbone, providing the majority of its experienced fighters, but the inclusion of Arab components — particularly the Deir ez-Zor Military Council and the Manbij Military Council — allowed the coalition to operate in predominantly Arab areas without appearing as a purely Kurdish occupation force.
The SDF's commander-in-chief, Mazloum Abdi (also known as Mazloum Kobani), became one of the most prominent military figures in the Syrian conflict. Under his leadership, the SDF grew from a few thousand fighters into a force of approximately 100,000, operating across a territory roughly one-third the size of Syria. The SDF also took on the enormous burden of detaining approximately 10,000 ISIS prisoners and managing camps holding tens of thousands of ISIS-affiliated families, a responsibility that no international body has been willing to fully assume.
International Alliances and Partnerships
The war against ISIS transformed Kurdish forces from regional actors into internationally recognised military partners. The Peshmerga received weapons, training, and advisory support from the United States, the United Kingdom, Germany, Italy, France, the Netherlands, and other coalition members. Germany's supply of MILAN anti-tank missiles to the Peshmerga was particularly significant, providing Kurdish forces with an effective weapon against the armoured vehicles that ISIS had captured from the Iraqi army.
The SDF's partnership with the United States was even deeper. US special operations forces embedded with SDF units on the frontlines, provided close air support through Operation Inherent Resolve, and supplied weapons, vehicles, and communications equipment. The US established multiple military bases in SDF-held territory, and the partnership extended beyond combat operations into governance, civil administration, and security sector development.
These partnerships came with inherent contradictions. Turkey, a NATO ally of the United States, viewed the YPG as a terrorist extension of the PKK and repeatedly objected to US support for the SDF. The US attempted to manage this tension through the SDF framework, but Turkey launched multiple military operations against Kurdish-held territory regardless, including Operation Olive Branch (Afrin, 2018), Operation Peace Spring (2019), and continued air and ground operations through 2024-2025. The Kurdish experience demonstrated that international military partnerships, however valuable on the battlefield, do not guarantee political protection.
Women in Kurdish Military Forces
The role of women in Kurdish military forces is one of the most distinctive features of Kurdish armed movements. The PKK integrated women into combat roles from its early years, and the principle of gender co-leadership became embedded in the organisational DNA of all PKK-affiliated movements. The YPJ formalised this into a separate all-female military structure, but women also served in the Peshmerga, in PKK-affiliated forces in Iran (PJAK), and in the Sinjar Resistance Units.
The international visibility of Kurdish women fighters during the war against ISIS — particularly the YPJ in Kobani and Raqqa — brought unprecedented global attention to both the Kurdish cause and the broader question of women's participation in armed conflict. It also created a powerful symbolic contrast with ISIS's system of sexual slavery and oppression of women. However, the reality of women's military participation is more complex than the media narrative sometimes suggests, and debates about the instrumentalisation of women fighters for propaganda purposes remain active within Kurdish political discourse.
Challenges and Contradictions
Kurdish military forces face several structural challenges that limit their effectiveness and political leverage. The Peshmerga's partisan division between KDP and PUK factions has undermined operational unity, even as the unification process advances. Both the Peshmerga and SDF remain heavily dependent on external support — the Peshmerga on Baghdad's budget allocations and international coalition training, the SDF on the continued US military presence in northeast Syria.
Intra-Kurdish rivalries also shape the military landscape. The KRG and the PKK-affiliated movements in Sinjar and Rojava operate on fundamentally different political models and have competing visions of Kurdish governance. The KDP-PKK rivalry in Sinjar created a proxy conflict within a liberated area, and Turkey has exploited these divisions to justify military operations against PKK positions in the Kurdistan Region of Iraq itself.
The SDF faces an additional existential challenge: the shifting dynamics of post-civil-war Syria. Turkish military operations in 2024-2025 resulted in the SDF losing control of Manbij and Tell Rifaat, while the Syrian state has increased pressure on SDF-held eastern territories. The SDF's long-term survival depends on whether it can negotiate a viable political settlement within a reconstituted Syrian state — a prospect that remains deeply uncertain.
The Future of Kurdish Military Power
The evolution from Peshmerga to SDF represents a remarkable transformation in Kurdish military capability. Kurdish forces moved from guerrilla mountain warfare to urban operations, from Soviet-era rifles to US-supplied equipment, and from isolated tribal fighters to partners of the world's most powerful military coalition. These changes were driven by necessity — the existential threat of ISIS — but they have left lasting institutional legacies.
The key question for the future is whether Kurdish military forces can sustain themselves without the external threat that gave them international significance. The Peshmerga's unification under MoPA, if completed, would represent the first truly professional Kurdish military institution in history. The SDF's ability to maintain its territory and negotiate its place in a post-conflict Syria will determine whether Rojava's experiment in democratic self-governance — and the military force that protects it — survives.
What is beyond dispute is that Kurdish fighters — from the Peshmerga veterans of the Barzani revolts to the young YPJ fighters who stormed Raqqa — have earned a permanent place in the military history of the Middle East. Their story is one of courage under fire, adaptation under pressure, and the enduring Kurdish determination to defend their people's existence against forces that sought to destroy it.
Key Events and Timeline
1961 — First Iraqi-Kurdish War begins; Peshmerga become a formalised fighting force under Mustafa Barzani
1978 — PKK founded by Abdullah Öcalan in Turkey
1984 — PKK launches armed campaign against the Turkish state
1994-1997 — Iraqi Kurdish civil war splits Peshmerga into KDP (Unit 80) and PUK (Unit 70) commands
2003 — Peshmerga fight alongside US forces in northern Iraq; capture Kirkuk and Mosul
2011 — YPG established in Syria as armed wing of the PYD
2013 — YPJ (Women's Protection Units) founded as all-female force
2014-2019 — Kurdish forces fight and defeat ISIS across Iraq and Syria
October 2015 — Syrian Democratic Forces formally established
2022 — US-KRG Memorandum of Understanding signed for Peshmerga unification
2025 — PKK announces ceasefire and disarmament process; Unit 80 integrated into MoPA as Area Command 1
February 2026 — Decree 703 transfers command of Units 70 and 80 to Ministry of Peshmerga Affairs
Frequently Asked Questions
What does Peshmerga mean?
Peshmerga is a Kurdish word meaning 'those who face death.' It refers to the armed forces of the Kurdistan Region of Iraq and has been used since the 1940s to describe Kurdish fighters resisting state oppression.
What is the difference between the Peshmerga and the SDF?
The Peshmerga are the armed forces of the Kurdistan Region of Iraq, historically divided between KDP and PUK commands. The SDF (Syrian Democratic Forces) are a multi-ethnic coalition in northeast Syria, led by the Kurdish YPG, that served as the primary ground force against ISIS in Syria. They operate in different countries under different political frameworks, though both fought against ISIS.
What is the YPJ?
The YPJ (Women's Protection Units) is an all-female Kurdish military force established in 2013 in Syria. It operates as a parallel structure to the YPG and participated in every major battle against ISIS, including Kobani, Manbij, Raqqa, and Baghuz. The YPJ became one of the most internationally recognised symbols of the war against ISIS.
Are the Peshmerga being unified?
Yes. The KRG and the US Department of Defense signed a Memorandum of Understanding in 2022 to unify the Peshmerga under the Ministry of Peshmerga Affairs. Significant progress was made in 2025-2026, including the integration of Unit 80 as Area Command 1 and the transfer of command authority via Decree 703 in February 2026. The target deadline for full unification is September 2026.
Is the YPG connected to the PKK?
The YPG shares organisational principles, ideology, and leadership connections with the PKK, and Turkey considers them the same organisation. The United States acknowledges the connection but treats the YPG and SDF as distinct entities for the purposes of its military partnership. The relationship remains one of the most politically sensitive issues in the region.
Who leads the SDF?
The SDF is commanded by Mazloum Abdi (also known as Mazloum Kobani), a Kurdish military leader who became one of the most prominent figures in the war against ISIS. Under his leadership, the SDF grew from a small force into a coalition of approximately 100,000 fighters controlling roughly one-third of Syria's territory.
References and Further Reading
Kurdistan24 — Kurdistan Region and US Reaffirm Commitment to Peshmerga Reform and Unification (February 2026)
US Department of Defense — Joint Statement on the Inaugural Peshmerga Executive Steering Committee Meeting (January 2024)
US Department of State Office of Inspector General — Report on Peshmerga Reform Progress (July 2025)
Kurdish Globe — A Historic Turning Point in Kurdistan's Military Institution (March 2026)
BBC News / Reuters / Al Jazeera — Coverage of YPG, SDF operations, and Turkish military campaigns in Syria
International Crisis Group — Reports on Kurdish military-political dynamics in Iraq and Syria
Washington Institute — Analysis of Kurdish military alliances and US partnership dynamics