This page collects definitions, doctrine, history, books, articles, and public references about unconventional warfare. Military professionals often shorten the term to UW.
Unconventional warfare is a complex topic. It can mean different things depending on the country, institution, doctrine, and time period being discussed. Even inside the U.S. defense community, the wording has changed over time.
At its simplest, unconventional warfare usually refers to support for a resistance movement or insurgency. It often involves indirect methods, local forces, political objectives, and long time horizons.
What Is Unconventional Warfare?
The modern U.S. military definition of unconventional warfare is:
“Activities conducted to enable a resistance movement or insurgency to coerce, disrupt, or overthrow a government or occupying power by operating through or with an underground, auxiliary, and guerrilla force in a denied area.”
This definition appears across multiple U.S. government and defense references, including modern gray-zone and irregular warfare documents.
That definition is short. The idea behind it is not.
UW is not just “guerrilla warfare.” It is not simply covert action. It is also not the same thing as terrorism, insurgency, or counterinsurgency.
Instead, UW is a way of thinking about conflict through resistance movements, surrogate forces, underground networks, political legitimacy, influence, and long-term pressure against an adversary.
Older Definition of Unconventional Warfare
Older U.S. doctrine used a broader definition. Joint Publication 1-02 previously described UW as:
“A broad spectrum of military and paramilitary operations, normally of long duration, predominantly conducted through, with, or by indigenous or surrogate forces who are organized, trained, equipped, supported, and directed in varying degrees by an external source.”
That older wording also included guerrilla warfare, subversion, sabotage, intelligence activities, and unconventional assisted recovery.
The newer wording is tighter. It focuses more clearly on enabling resistance or insurgency against a government or occupying power.
Why Unconventional Warfare Matters
UW gives governments a way to compete below the level of full conventional war.
It may be used when a direct military campaign is too costly, too risky, too escalatory, or politically impossible. It can also support a larger conventional campaign.
This is why UW often appears in discussions about the gray zone, political warfare, irregular warfare, proxy warfare, and hybrid warfare.
Modern conflict rarely fits clean categories. States and non-state actors may use proxies, information operations, cyber activity, sabotage, economic pressure, and local armed groups to create pressure without triggering open war.
UW is one part of that wider problem.
How Unconventional Warfare Fits Into U.S. Doctrine
Unconventional warfare is one of the core activities associated with U.S. special operations forces.
USSOCOM lists unconventional warfare alongside other core activities such as direct action, special reconnaissance, foreign internal defense, civil affairs operations, counterterrorism, and military information support operations.
For U.S. Army Special Forces, UW has long been central to the mission. The Green Berets were built around language skills, regional knowledge, small-team operations, and work with indigenous or partner forces.
UW is also connected to irregular warfare.
Irregular warfare is the larger category. UW is one activity within it.
Unconventional Warfare and Irregular Warfare
Irregular warfare, or IW, covers competition and conflict that uses indirect, asymmetric, and often non-attributable methods.
That can include:
- Unconventional warfare
- Foreign internal defense
- Counterinsurgency
- Counterterrorism
- Stabilization activities
- Operations in the information environment
- Support through partners, proxies, or surrogate forces
The important distinction is simple.
UW supports a resistance movement or insurgency. IW is the wider umbrella for indirect and asymmetric conflict.
Unconventional Warfare and Special Warfare
Special warfare is another related term.
In U.S. Army special operations doctrine, special warfare generally refers to activities that combine military action with political, human, and partner-force considerations. UW, foreign internal defense, civil affairs, and military information support operations often appear in this conversation.
Special warfare depends heavily on people. Culture matters. Language matters. Legitimacy matters.
That is one reason UW is usually studied as much as a political problem as a military one.
Unconventional Warfare and Political Warfare
Political warfare is an old term that has returned to modern defense discussions.
It refers to the use of political, economic, informational, diplomatic, and military tools to shape outcomes without relying only on conventional force.
UW can support political warfare. It can also be used against the United States and its allies by adversaries using proxies, influence networks, and local resistance forces.
Counter-Unconventional Warfare
Counter-unconventional warfare, sometimes shortened to C-UW, refers to efforts to detect, disrupt, and defeat an adversary’s use of unconventional warfare.
This concept became more prominent as U.S. planners studied how rivals use proxies, separatist groups, militias, covert influence, and gray-zone pressure.
In plain language, C-UW asks a direct question:
How does a government defend itself when an adversary tries to coerce, disrupt, or destabilize it through indirect means?
Key Components of Unconventional Warfare
UW is usually discussed through several recurring components.
These terms appear across doctrine, historical studies, and resistance literature.
Resistance Movement
A resistance movement is a group or network that opposes a government, occupying power, or controlling authority.
Not every resistance movement is armed. Some begin as political, social, labor, ethnic, tribal, religious, or ideological movements.
In UW, the resistance movement is the central actor. Outside support is meant to enable that movement, not replace it.
Insurgency
An insurgency is an organized movement seeking to overthrow, weaken, or challenge an authority.
Insurgencies may use political organization, propaganda, intimidation, guerrilla tactics, sabotage, and shadow governance.
UW may support an insurgency, but the two terms are not identical.
Underground
The underground is the clandestine portion of a resistance organization.
It may handle secret communications, intelligence collection, logistics, recruiting, influence work, or other hidden support functions.
Because the underground is covert by nature, it is often difficult to study from public sources.
Auxiliary
The auxiliary is the support network around a resistance movement.
Auxiliary members may not appear to be part of the movement. They can provide access, shelter, transport, supplies, information, or local knowledge.
In many historical cases, the auxiliary was essential. Armed groups rarely survive without some form of local support.
Guerrilla Force
The guerrilla force is the armed element of a resistance movement.
It may conduct raids, ambushes, sabotage, reconnaissance, or harassment operations. These actions are usually smaller than conventional military operations.
Guerrilla forces depend on mobility, local support, intelligence, and the ability to avoid decisive defeat.
Denied Area
A denied area is a place where normal access is restricted or dangerous.
That may be because of enemy control, geography, surveillance, political risk, or the absence of friendly infrastructure.
UW often takes place in denied or politically sensitive environments.
Publications and References About Unconventional Warfare
The following public references are useful starting points for students, researchers, military historians, and readers interested in unconventional warfare.
USSOCOM Core Activities
This page lists core activities for U.S. Special Operations Command. It includes unconventional warfare, direct action, special reconnaissance, foreign internal defense, civil affairs operations, counterterrorism, and military information support operations.
USASOC Unconventional Warfare Pocket Guide
Unconventional Warfare Pocket Guide, Version 1.0
This guide was published by U.S. Army Special Operations Command in 2016. GovInfo preserves a public copy. It is a useful quick reference for UW doctrine, concepts, academic inquiry, and suggested reading.
ATP 3-05.1: Unconventional Warfare
ATP 3-05.1, Unconventional Warfare
This Army Techniques Publication is one of the main public doctrinal references for U.S. Army unconventional warfare at the combined joint special operations task force level.
ADP 3-05: Special Operations
This publication gives a wider view of Army special operations. It is helpful for understanding where UW sits within the broader special operations framework.
DoD Instruction 3000.07: Irregular Warfare
DoD Instruction 3000.07, Irregular Warfare
This is a modern Department of Defense policy document on irregular warfare. It is useful for readers who want to understand how UW connects to current policy language around indirect, asymmetric, and non-attributable activities.
Updated IC Gray Zone Lexicon
Updated IC Gray Zone Lexicon: Key Terms and Definitions
This National Intelligence Council document gives current public definitions for gray-zone terms, including unconventional warfare.
A Comprehensive and Proactive Approach to Unconventional Warfare
A Comprehensive and Proactive Approach to Unconventional Warfare
Will Irwin’s 2016 JSOU Press paper examines UW in the context of gray-zone political warfare. It is especially useful for readers studying Syria, proxy warfare, and the limits of short-term train-and-equip efforts.
Unconventional Warfare in the Gray Zone
Unconventional Warfare in the Gray Zone
This Joint Force Quarterly article by Joseph Votel, Charles Cleveland, Charles Connett, and Will Irwin discusses UW as part of the competition space between peace and conventional war.
Unconventional Warfare on the Conventional Battlefield
Unconventional Warfare on the Conventional Battlefield
This Military Review article explains how UW can support larger conventional campaigns. It also warns against two common errors: ignoring UW completely or expecting too much from it.
Books About Unconventional Warfare
The following books are frequently discussed by readers interested in guerrilla warfare, resistance movements, insurgency, special operations, and political warfare.
- Invisible Armies by Max Boot
- Chasing Ghosts by John J. Tierney Jr.
- Guerrilla by Charles W. Thayer
- Afghanistan and the Troubled Future of Unconventional Warfare by Hy S. Rothstein
- Instruments of Statecraft: U.S. Guerrilla Warfare, Counterinsurgency, and Counterterrorism, 1940–1990 by Michael McClintock
- The Art of Counter-Revolutionary War by John J. McCuen
- Modern Irregular Warfare by Friedrich August von der Heydte
- Unconventional Conflicts in a New Security Era by Sam C. Sarkesian
- Undergrounds in Insurgent, Revolutionary, and Resistance Warfare by Andrew R. Molnar
- Human Factors Considerations of Undergrounds in Insurgencies by Andrew R. Molnar and collaborators
Some older books use language that reflects their era. They are still useful for historical study, but readers should compare them with modern doctrine and current scholarship.
Articles and Essays About Unconventional Warfare
The following articles provide useful context. Some are older, but they remain helpful for tracing the evolution of UW thinking.
- USASOC Unconventional Warfare Pocket Guide — Small Wars Journal
- Reclaiming Unconventional Warfare in the Renewed Age of Irregular Conflict — Small Wars Journal
- Unconventional Warfare Does Not Belong to Special Forces — War on the Rocks
- The Two Special Operations Trinities — Small Wars Journal
- Redefining Irregular Warfare: Legitimacy, Coercion, and Power — Modern War Institute
- Competing Below the Threshold — Military Review
- Unconventional Warfare in the Gray Zone — Joint Force Quarterly
- Unconventional Warfare on the Conventional Battlefield — Military Review
Historical Examples of Unconventional Warfare
Unconventional warfare is ancient in origin, even when the modern terminology is new.
Resistance, guerrilla activity, subversion, and support to local forces have appeared in wars for centuries. What changed in the modern era is the doctrine, terminology, bureaucracy, and technology around it.
Jedburgh Teams in World War II
The Jedburgh teams were small Allied teams inserted into occupied Europe during World War II.
Their mission was to work with local resistance forces, support sabotage, improve coordination, and disrupt German operations before and after the Normandy landings.
They are often studied as early examples of modern special operations and unconventional warfare.
Partisan Warfare in the Balkans
During World War II, Allied support to Balkan partisans created constant pressure on Axis forces.
Partisan activity forced Germany and its allies to divert troops, protect supply lines, and fight in difficult terrain.
This history is useful because it shows how irregular forces can shape a larger conventional war.
Unconventional Warfare in the Pacific
The Pacific theater also included unconventional and special operations.
Examples include operations in Burma, the Philippines, and other areas where local resistance, intelligence networks, and special operations forces worked against Japanese occupation.
These wartime experiences helped shape later U.S. special operations and intelligence capabilities.
President Kennedy and Special Forces
President John F. Kennedy helped elevate the role of U.S. Army Special Forces in the early 1960s.
In a 1962 speech at West Point, Kennedy described a type of conflict fought by guerrillas, subversives, insurgents, and assassins. His remarks captured the Cold War concern that many future conflicts would not look like conventional wars between uniformed armies.
Special Forces had already been established in 1952. Kennedy’s support increased their visibility and helped accelerate their growth.
Afghanistan, Iraq, and the Return of Irregular Warfare
The post-9/11 wars brought renewed attention to irregular warfare, insurgency, counterinsurgency, foreign internal defense, and UW.
Afghanistan also showed the power and limits of working with local forces.
Early operations after 9/11 are often cited as examples of special operations forces, intelligence agencies, airpower, and local allies producing fast battlefield effects. Later years showed how hard it is to convert battlefield success into stable political outcomes.
Ukraine, Proxies, and Modern Resistance
Recent conflicts have brought new attention to resistance planning, territorial defense, civil resistance, information operations, and the role of partner support.
These examples do not map perfectly onto classic UW doctrine. Modern warfare blends conventional force, drones, cyber operations, intelligence sharing, sanctions, logistics, information campaigns, and local defense networks.
That is exactly why UW remains a live topic.
Related Terms
Guerrilla Warfare
Guerrilla warfare is a method of fighting. It usually involves small, mobile forces using raids, ambushes, sabotage, and harassment.
UW may include guerrilla warfare, but UW is broader. It includes political, logistical, intelligence, underground, and auxiliary components.
Insurgency
An insurgency is an organized challenge to an established authority.
UW may support an insurgency. Counterinsurgency is the effort to defeat one.
Foreign Internal Defense
Foreign internal defense, or FID, is support to a partner government’s internal defense and development efforts.
FID and UW can look like opposites. FID supports a government. UW supports a resistance movement or insurgency against a government or occupying power.
Political Warfare
Political warfare uses non-military and military tools to shape political outcomes.
It may include diplomacy, economic pressure, propaganda, information operations, covert support, and partner-force activity.
Gray Zone
The gray zone is the space between routine state competition and open war.
It is where states and non-state actors use pressure, ambiguity, proxies, cyber activity, influence, and limited force to gain advantage without triggering a conventional military response.
Hybrid Warfare
Hybrid warfare blends conventional and irregular tools.
It may include regular forces, irregular forces, cyber operations, propaganda, economic leverage, political subversion, and covert action.
Proxy Warfare
Proxy warfare occurs when a state or sponsor uses another group, force, or actor to pursue its goals.
Proxies can provide deniability. They can also create serious blowback for the sponsor.
Research Centers and Useful Sites
- U.S. Special Operations Command
- U.S. Army Special Operations Command
- Army University Press
- Small Wars Journal
- Modern War Institute
- NDU Press
- Joint Special Operations University Press
- GovInfo
- Office of the Director of National Intelligence
- Federation of American Scientists Intelligence Resource Program
Selected Bibliography
- Agee, Ryan C., and Maurice K. DuClos. Why UW: Factoring in the Decision Point for Unconventional Warfare. Naval Postgraduate School, 2012.
- Boot, Max. Invisible Armies: An Epic History of Guerrilla Warfare from Ancient Times to the Present. Liveright, 2013.
- Irwin, Will. A Comprehensive and Proactive Approach to Unconventional Warfare. Joint Special Operations University Press, 2016.
- McClintock, Michael. Instruments of Statecraft: U.S. Guerrilla Warfare, Counterinsurgency, and Counterterrorism, 1940–1990. Pantheon Books, 1992.
- Molnar, Andrew R. Undergrounds in Insurgent, Revolutionary, and Resistance Warfare. Special Operations Research Office, American University, 1963.
- Molnar, Andrew R., Jerry M. Tinker, and John D. LeNoir. Human Factors Considerations of Undergrounds in Insurgencies. Special Operations Research Office, American University, 1966.
- Rothstein, Hy S. Afghanistan and the Troubled Future of Unconventional Warfare. Naval Institute Press, 2006.
- Thayer, Charles W. Guerrilla. Signet, 1965.
- Votel, Joseph L., Charles T. Cleveland, Charles T. Connett, and Will Irwin. “Unconventional Warfare in the Gray Zone.” Joint Force Quarterly, 2016.
Page Notes and Link Maintenance
This page is based on an older SecurityInfoNet resource page that collected public references on unconventional warfare.
Some older links from the original page pointed to PDFs, military pages, or personal sites that may no longer be available. Where possible, this updated version favors more stable sources such as GovInfo, USSOCOM, Army University Press, NDU Press, JSOU Press, FAS, and official government domains.
Because doctrine changes, readers should verify definitions against current U.S. government publications before citing them in academic, legal, or professional work.
This page is intended as a public research guide for military history, doctrine, and security studies.