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Fourth-generation warfare (4GW) is conflict characterized by a blurring of the lines between war and politics, soldier and civilian.

The term was first used in 1989 by a team of United States analysts, including William S. Lind, to describe warfare's return to a decentralized form. In terms of generational modern warfare, the fourth generation signifies the nation states' loss of their near-monopoly on combat forces, returning to modes of conflict common in pre-modern times.

The simplest definition includes any war in which one of the major participants is not a state but rather a violent non-state actor. Classical examples, such as the slave uprising under Spartacus or the assassination of Julius Caesar by members of the Roman Senate, predate the modern concept of warfare and are examples of this type of conflict.


Guerillas in Maguindanao, 1999

Fourth generation warfare is defined as conflicts which involve the following elements:

  • Are complex and long term
  • Terrorism (tactic)
  • A non-national or transnational base –highly decentralized
  • A direct attack on the enemy's culture[Clarification needed]
  • Highly sophisticated psychological warfare, especially through media manipulation and lawfare
  • All available pressures are used – political, economic, social and military
  • Occurs in low intensity conflict, involving actors from all networks
  • Non-combatants are tactical dilemmas
  • Lack of hierarchy
  • Small in size, spread out network of communication and financial support
  • Use of insurgency and guerrilla tactics


The concept was first described by the authors William S. Lind, Colonel Keith Nightengale (US Army), Captain John F. Schmitt (USMC), Colonel Joseph W. Sutton (US Army), and Lieutenant Colonel Gary I. Wilson (USMCR) in a 1989 Marine Corps Gazette article entitled “The Changing Face of War: Into the Fourth Generation”.[1] In 2006, the concept was expanded upon by USMC Colonel Thomas X. Hammes (Ret.) in his well-received[2] book, The Sling and The Stone.

The generations of warfare described by these authors are:

  • First-generation warfare: tactics of line and column; which developed in the age of the smoothbore musket. Lind describes First Generation of warfare as beginning after the Peace of Westphalia in 1648 ending the Thirty Years' War and establishing the state’s need to organize and conduct war.[3] 1GW consisted of tightly ordered soldiers with top-down discipline. These troops would fight in close order and advance slowly. This began to change as the battlefield changed. Old line and column tactics are now considered suicidal as the bow and arrow/sword morphed into the rifle and machine gun.
  • Second-generation warfare: tactics of linear fire and movement, with reliance on indirect fire. This type of warfare can be seen in the early stages of WWI where there was still strict adherence to drill and discipline of formation and uniform. However, there remained a dependence on artillery and firepower to break the stalemate and move towards a pitched battle.
  • Third-generation warfare: tactics of infiltration to bypass and collapse the enemy's combat forces rather than seeking to close with and destroy them; and defence in depth. The 3GW military seeks to bypass the enemy, and attack his rear forward, such as the tactics used by German Storm Troopers in WWI against the British and French in order to break the trench warfare stalemate (Lind 2004). These aspects of 3GW bleed into 4GW as it is also warfare of speed and initiative. However, it targets both military forces and home populations.

The use of fourth generation warfare can be traced to the Cold War period, as superpowers and major powers attempted to retain their grip on colonies and captured territories. Unable to withstand direct combat against bombers, tanks, and machine guns, non-state entities used tactics of education/propaganda, movement-building, secrecy, terror, and/or confusion to overcome the technological gap.

Fourth generation warfare has often involved an insurgent group or other violent non-state actor trying to implement their own government or reestablish an old government over the current ruling power. However, a non-state entity tends to be more successful when it does not attempt, at least in the short term, to impose its own rule, but tries simply to disorganize and delegitimize the state in which the warfare takes place. The aim is to force the state adversary to expend manpower and money in an attempt to establish order, ideally in such a highhanded way that it merely increases disorder, until the state surrenders or withdraws.

Fourth generation warfare is often seen in conflicts involving failed states and civil wars, particularly in conflicts involving non-state actors, intractable ethnic or religious issues, or gross conventional military disparities. Many of these conflicts occur in the geographic area described by author Thomas P.M. Barnett as the Non-Integrating Gap, fought by countries from the globalised Functioning Core.

4GW has much in common with traditional low-intensity conflict in its classical forms of insurgency and guerrilla war. As in those small wars, the conflict is initiated by the "weaker" party through actions which can be termed "offensive". The difference lies in the manner in which 4GW opponents adapt those traditional concepts to present day conditions. These conditions are shaped by technology, globalization, religious fundamentalism and a shift in moral and ethical norms which brings legitimacy to certain issues previously considered restrictions on the conduct of war. This amalgamation and metamorphosis produces novel ways of war for both the entity on the offensive and that on the defensive.[4]


Fourth generation warfare is normally characterized by a violent non-state actor (VNSA) fighting a state. This fighting can be physically done, such as by modern examples Hezbollah or the Liberation Tigers of Tamil Eelam (LTTE). In this realm the VNSA uses all three levels of fourth generation warfare. These are the physical (actual combat; it is considered the least important), mental (the will to fight, belief in victory, etc.) and moral (the most important, this includes cultural norms, etc.) levels.

A 4GW enemy has the following characteristics: lack of hierarchal authority, lack of formal structure, patience and flexibility, ability to keep a low profile when needed, and small size.[5] A 4GW adversary might use the tactics of an insurgent, terrorist, or guerrilla in order to wage war against a nation's infrastructure. Fourth generation warfare takes place on all fronts: economical, political, the media, military, and civilian.

Resistance can also be below the physical level of violence. This is via non-violent means, such as Gandhi’s opposition to the British Empire[citation needed]or Martin Luther King’s marches[citation needed]. Both desired their factions to deescalate the conflict while the state escalates against them, the objective being to target the opponent on the moral and mental levels rather than the physical level.[citation needed] The state is then seen as a bully and loses support.

Another characteristic of fourth generation warfare is that unlike in third generation warfare, the VNSA’s forces are decentralized. With fourth generation warfare there may even be no single organisation and that smaller groups organize into impromptu alliances to target a bigger threat (that being the state armed forces or another faction). As a result these alliances are weak and if the state’s military leadership is smart enough they can split their enemy and cause them to fight amongst themselves.

Fourth generation warfare goals:[6]

  • Survival
  • To convince the enemy’s political decision makers that their goals are either unachievable or too costly for the perceived benefit[7]

Yet another factor is that political centers of gravity have changed. These centers of gravity may revolve around nationalism, religion, or family or clan honor.

Disaggregated forces, such as guerrillas, terrorists and rioters, lacking a center of gravity, deny to their enemies a focal point at which to deliver a conflict ending blow.[6] As a result strategy becomes more problematic while combating a VNSA.

It has been theorized that a state vs. state conflict in fourth generation warfare would involve the use of computer hackers and international law to obtain the weaker side’s objectives, the logic being that the civilians of the stronger state would lose the will to fight as a result of seeing their state engage in alleged atrocities and having their own bank accounts harmed.

Criticism of the theory

Strategic Studies Institute writer Antulio J. Echevarria II in an article Fourth-Generation War and Other Myths[8] argues what is being called fourth generation warfare are simply insurgencies. He also claims that 4GW was "reinvented" by Lind to create the appearance of having predicted the future. Echevarria writes: “the generational model is an ineffective way to depict changes in warfare. Simple displacement rarely takes place, significant developments typically occur in parallel."

Rod Thornton argues that Hammes and Lind are "providing an analytical lens through which to view the type of opposition that exists now 'out there' and to highlight the shortcomings of the current US military in dealing with that opposition." Instead of fourth generation warfare being an explanation for a new way of warfare it allows the blending of different generations of warfare with the exception that fourth generation also encompasses new technology. Fourth generation warfare theorists such as Lind and Hammes wish to make the point "is not just that the military's structure and equipment are ill-suited to the 4GW problem, but so is its psyche".[5]


See also


  1. Marine Corps Gazzette, “The Changing Face of War: Into the Fourth Generation”, October 1989 Abstract
  2. Colonel Mike Capstick, Canadian Military Journal "Book Review" July 2008
  3. Lind, William S. "Understanding Fourth Generation Warfare." ANTIWAR.COM 15 JAN 2004 29 Mar 2009
  4. Ghanshyam. S. Katoch, Fourth Generation War: Paradigm For Change, (June, 2005). Masters Thesis submitted at The Naval Postgraduate School, Monterey, California. Available from Defence Technical Information centre at
  5. 5.0 5.1 Thornton, Rod (2007). Asymmetric Warfare. Malden, MA: Polity Press
  6. 6.0 6.1 Beyond Fourth Generation Warfare, Dr. George Friedman, Stratfor Forecasting, p. 1, July 17, 2007
  7. Colonel Thomas X. Hammes, 'Four Generations of Warfare' in The Sling and The Stone: On War in the 21st Century, St. Paul, MN. 2006, p 293.
  8. Echevarria JA. Fourth Generation War and Other Myths. November 2005, Strategic Studies Insititute.

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