Asymmetric warfare (or asymmetric engagement) is war between belligerents whose relative military power differs significantly, or whose strategy or tactics differ significantly. This is typically a war between a standing, professional army and an insurgency or resistance movement militias who often have status of unlawful combatants.
Asymmetric warfare can describe a conflict in which the resources of two belligerents differ in essence and, in the struggle, interact and attempt to exploit each other's characteristic weaknesses. Such struggles often involve strategies and tactics of unconventional warfare, the weaker combatants attempting to use strategy to offset deficiencies in quantity or quality of their forces and equipment. Such strategies may not necessarily be militarized. This is in contrast to symmetric warfare, where two powers have comparable military power and resources and rely on tactics that are similar overall, differing only in details and execution.
The term is also frequently used to describe what is also called "guerrilla warfare", "insurgency", "counterinsurgency", "rebellion", "terrorism", and "counterterrorism", essentially violent conflict between a formal military and an informal, less equipped and supported, undermanned but resilient and motivated opponent. Asymmetric warfare is a form of irregular warfare.
The popularity of the term dates from Andrew J. R. Mack's 1975 article "Why Big Nations Lose Small Wars" in World Politics, in which "asymmetric" referred simply to a significant disparity in power between opposing actors in a conflict. "Power", in this sense, is broadly understood to mean material power, such as a large army, sophisticated weapons, an advanced economy, and so on. Mack's analysis was largely ignored in its day, but the end of the Cold War sparked renewed interest among academics. By the late 1990s, new research building on Mack's insights was beginning to mature, and, after 2004, the U.S. military began once again seriously to consider the problems associated with asymmetric warfare.
Discussion since 2004 has been complicated by the tendency of academic and military communities to use the term in different ways, and by its close association with guerrilla warfare, insurgency, terrorism, counterinsurgency, and counterterrorism. Military authors tend to use the term "asymmetric" to refer to the indirect nature of the strategies many weak actors adopt, or even to the nature of the adversary itself (e.g., "asymmetric adversaries can be expected to ...") rather than to the correlation of forces.
Academic authors tend to focus on explaining two puzzles in asymmetric conflict. First, if "power" determines victory in conflict, then why would weaker actors decide to fight stronger actors? Key explanations include:
Second, if "power", as conventionally understood, conduces to victory in war, then how is the victory of the "weak" over the "strong" explained? Key explanations include:
Asymmetric conflicts include both interstate and civil wars, and over the past two hundred years have generally been won by strong actors. Since 1950, however, weak actors have won a majority of all asymmetric conflicts.
In most conventional warfare, the belligerents deploy forces of a similar type and the outcome can be predicted by the quantity of the opposing forces or by their quality, for example better command and control of their forces (c2). There are times where this is not true because the composition or strategy of the forces makes it impossible for either side to close in battle with the other. An example of this is the standoff between the continental land forces of the French Army and the maritime forces of the United Kingdom's Royal Navy during the French Revolutionary and Napoleonic Wars. In the words of Admiral Jervis during the campaigns of 1801, "I do not say, my Lords, that the French will not come. I say only they will not come by sea", and a confrontation that Napoleon Bonaparte described as that between the elephant and the whale.
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The tactical success of asymmetric warfare is dependent on at least some of the following assumptions:
There are two different viewpoints on the relationship between asymmetric warfare and terrorism. In the modern context, asymmetric warfare is increasingly considered a component of fourth generation warfare. When practiced outside the laws of war, it is often defined as terrorism, though rarely by its practitioners or their supporters. The other view is that asymmetric warfare does not coincide with terrorism.
Terrain that limits mobility, such as forests and mountains, can be used as a force multiplier by the smaller force and as a force inhibitor against the larger force, especially one operating far from its logistical base. Such terrain is called difficult terrain. Urban areas, though generally having good transport access, provide innumerable ready-made defensible positions with easy escape routes, and can also become difficult terrain if prolonged combat fills the streets with rubble.
The contour of the land is an aid to the army; sizing up opponents to determine victory, assessing dangers and distance. "Those who do battle without knowing these will lose."
The guerrillas must move amongst the people as a fish swims in the sea.-- Mao Zedong.
An early example of terrain advantage is the Battle of Thermopylae, 480 BC, where the narrow terrain of a defile was used to funnel the Persian forces, who were numerically superior, to a point where they could not use their size as an advantage.
In 12th century, irregulars known as the Assassins were successful in the Nizari Ismaili state. The "state" consisted of fortresses (such as the Alamut Castle) built on strategic hilltops and highlands with difficult access, surrounded by hostile lands. The Assassins developed tactics to eliminate high-value targets that posed a threat to their security, including the Crusaders.
In the American Revolutionary War, Patriot Lieutenant Colonel Francis Marion, known as the "Swamp Fox", took advantage of irregular tactics, interior lines, and the wilderness of colonial South Carolina to stymie larger British regular forces.
Yugoslav Partisans, starting as small detachments around mountain villages in 1941, fought the German and other Axis occupation forces, successfully taking advantage of the rough terrain to survive despite their small numbers. Over the next four years, they slowly forced their enemies back, recovering population centers and resources, eventually growing into the regular Yugoslav Army.
Civilians could play an important role in determining the outcome of an asymmetric war. In such conflicts, when it is easy for insurgents to quickly assimilate into the population after an attack, tips on timing or location of insurgent activity can greatly undermine the resistance. An information-centric framework, in which civilians are seen primarily as sources of strategic information rather than resources, provides a paradigm to better understand the dynamics of such conflicts where civilian information-sharing is important. The framework assumes that:
Given the additional assumption that the larger or dominant force is the government, the framework suggests the following implications:
A survey of empirical literature on conflict, does not provide conclusive evidence on the aforementioned claims. But the framework provides a starting point to further explore the role of civilian information sharing in asymmetric warfares.
Where asymmetric warfare is carried out (generally covertly) by allegedly non-governmental actors who are connected to or sympathetic to a particular nation's (the "state actor's") interest, it may be deemed war by proxy. This is typically done to give deniability to the state actor. The deniability can be important to keep the state actor from being tainted by the actions, to allow the state actor to negotiate in apparent good faith by claiming they are not responsible for the actions of parties who are merely sympathizers, or to avoid being accused of belligerent actions or war crimes. If proof emerges of the true extent of the state actor's involvement, this strategy can backfire; for example see Iran-contra and Philip Agee.
From its initiation, the American Revolutionary War was, necessarily, a showcase for asymmetric techniques. In the 1920s, Harold Murdock of Boston attempted to solve the puzzle of the first shots fired on Lexington Green, and came to the suspicion that the few score militia men who gathered before sunrise to await the arrival of hundreds of well-prepared British soldiers were sent specifically to provoke an incident which could be used for propaganda purposes. The return of the British force to Boston following the search operations at Concord was subject to constant skirmishing, using partisan forces gathered from communities all along the route, making maximum use of the terrain (particularly trees and stone field walls) to overcome the limitations of their weapons - muskets with an effective range of only about 50-70 metres. Throughout the war, skirmishing tactics against British troops on the move continued to be a key factor in the Patriots' success; however, they may also have encouraged the occasional incidents, particularly in the later stages, where British troops used alleged surrender violations as a justification for killing large numbers of captives (e.g., Waxhaw and Groton Heights).
Another feature of the long march from Concord was the urban warfare technique of using buildings along the route as additional cover for snipers. When revolutionary forces forced their way into Norfolk, Virginia, and used waterfront buildings as cover for shots at British vessels out in the river, the response of destruction of those buildings was ingeniously used to the advantage of the rebels, who encouraged the spread of fire throughout the largely Loyalist town, and spread propaganda blaming it on the British. Shortly afterwards they destroyed the remaining houses, on the grounds that they might provide cover for British soldiers. British forces never adopted a popular response to partisan-style asymmetric warfare--retribution massacres of groups selected on a semi-random basis from the population at large.
The rebels also adopted a form of asymmetric sea warfare, by using small, fast vessels to avoid the Royal Navy, and capturing or sinking large numbers of merchant ships; however the British responded by issuing letters of marque permitting private armed vessels to undertake reciprocal attacks on enemy shipping. John Paul Jones became notorious in Britain for his expedition from France in the little sloop of war Ranger in April 1778, during which, in addition to his attacks on merchant shipping, he made two landings on British soil. The effect of these raids, particularly when coupled with his capture of the Royal Navy's HMS Drake - the first such success in British waters, but not Jones's last - was to force the British government to increase resources for coastal defence, and to create a climate of fear among the British public which was subsequently fed by press reports of his preparations for the 1779 Bonhomme Richard mission.
From 1776, the conflict turned increasingly into a proxy war on behalf of France, following a strategy proposed in the 1760s but initially resisted by the idealistic young King Louis XVI, who came to the throne at the age of 19 a few months before Lexington. France also encouraged proxy wars against the British in India, but ultimately drove Great Britain to the brink of defeat by entering the war(s) directly, on several fronts throughout the world.[page needed]
The American Civil War saw the rise of asymmetric warfare in the Border States, and in particular on the US Western Territorial Border after the Kansas-Nebraska Act of 1854 opened the territories to voting on the expansion of slavery beyond the Missouri Compromise lines. Political implications of this broken 1820s compromise were nothing less than the potential expansion of slavery all across the North American continent, including the northern reaches of the annexed Mexican territories to California and Oregon. So the stakes were high and it caused a flood of immigration to the border: some to grab land and expand slavery west, others to grab land and vote down the expansion of slavery. The pro-slavery land grabbers began asymmetric violent attacks against the more pacifist abolitionists who had settled Lawrence and other territorial towns for suppressing slavery. John Brown, the abolitionist, travelled to Osawatomie in the Kansas Territory expressly to foment retaliatory attacks back against the pro-slavery guerrillas who, by 1858, had twice ransacked both Lawrence and Osawatomie (where one of Brown's sons was shot dead).
The abolitionists would not return the attacks and Brown theorized that a violent spark set off on "the Border" would be a way to finally ignite his long hoped-for slave rebellion.[time needed] Brown had broad-sworded slave owners at Potawatomi Creek, so the bloody civilian violence was initially symmetrical; however, once the American Civil War ignited in 1861, and when the state of Missouri voted overwhelmingly not to secede from the Union, the pro-slavers on the MO-KS border were driven either south to Arkansas and Texas, or underground--where they became guerrilla fighters and "Bushwhackers" living in the brushy ravines throughout northwest Missouri across the (now) state line from Kansas. The bloody "Border War" lasted all during the Civil War (and long after with guerrilla partisans like the James brothers cynically robbing and murdering, aided and abetted by lingering lost-causers[page needed]). Tragically the Western Border War was an asymmetric war: pro-slavery guerrillas and paramilitary partisans on the pro-Confederate side attacking pro-Union townspeople and commissioned Union military units; with the Union army trying to keep both in check: blocking Kansans and pro-Union Missourians from organizing militarily against the marauding Bushwhackers.
The worst act of domestic terror in US history came in August 1863 when paramilitary guerrillas amassed 350 strong and rode all night 50 miles across eastern Kansas to the abolitionist stronghold of Lawrence (a political target) and destroyed the town, gunning down 150 civilians. The Confederate officer whose company had joined Quantrill's Raiders that day witnessed the civilian slaughter and forbade his soldiers from joining in the carnage. The commissioned officer refused to participate in Quantrill's asymmetric warfare on civilians.[full ]
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The Philippine-American War (1899-1902) was an armed conflict between the United States and Filipino revolutionaries. Estimates of the Filipino forces vary between 100,000 and 1,000,000, with tens of thousands of auxiliaries. Lack of weapons and ammunition was a significant impediment to the Filipinos, so most of the forces were only armed with bolo knives, bows and arrows, spears and other primitive weapons that, in practice, proved vastly inferior to U.S. firepower.
The goal, or end-state, sought by the First Philippine Republic was a sovereign, independent, socially stable Philippines led by the ilustrado (intellectual) oligarchy. Local chieftains, landowners, and businessmen were the principales who controlled local politics. The war was strongest when illustrados, principales, and peasants were unified in opposition to annexation. The peasants, who provided the bulk of guerrilla manpower, had interests different from their illustrado leaders and the principales of their villages. Coupled with the ethnic and geographic fragmentation, unity was a daunting task. The challenge for Aguinaldo and his generals was to sustain unified Filipino public opposition; this was the revolutionaries' strategic center of gravity. The Filipino operational center of gravity was the ability to sustain its force of 100,000 irregulars in the field. The Filipino general Francisco Macabulos described the Filipinos' war aim as, "not to vanquish the U.S. Army but to inflict on them constant losses." They initially sought to use conventional tactics and an increasing toll of U.S. casualties to contribute to McKinley's defeat in the 1900 presidential election. Their hope was that as president the avowedly anti-imperialist future Secretary of state William Jennings Bryan would withdraw from the Philippines. They pursued this short-term goal with guerrilla tactics better suited to a protracted struggle. While targeting McKinley motivated the revolutionaries in the short term, his victory demoralized them and convinced many undecided Filipinos that the United States would not depart precipitously. For most of 1899, the revolutionary leadership had viewed guerrilla warfare strategically only as a tactical option of final recourse, not as a means of operation which better suited their disadvantaged situation. On November 13, 1899, Emilio Aguinaldo decreed that guerrilla war would henceforth be the strategy. This made American occupation of the Philippine archipelago all the more difficult over the next few years. In fact, during just the first four months of the guerrilla war, the Americans had nearly 500 casualties. The Philippine Revolutionary Army began staging bloody ambushes and raids, such as the guerrilla victories at Paye, Catubig, Makahambus, Pulang Lupa, Balangiga and Mabitac. At first, it even seemed as if the Filipinos would fight the Americans to a stalemate and force them to withdraw. This was even considered by President McKinley at the beginning of the phase. The shift to guerrilla warfare drove the US Army to adopt counter-insurgency tactics. Civilians were given identification and forced into concentration camps with a publicly announced deadline after which all persons found outside of camps without identification would be shot on sight. Thousands of civilians died in these camps due to poor conditions.
Asymmetric warfare featured prominently during the Second Boer War. After an initial phase, which was fought by both sides as a conventional war, the British captured Johannesburg, the Boers' largest city, and captured the capitals of the two Boer Republics. The British then expected the Boers to accept peace as dictated by the victors in the traditional European way. However instead of capitulating, the Boers fought a protracted guerrilla war. 20,000-30,000[ambiguous] Boer guerrillas were only defeated after the British brought to bear 450,000 troops, about ten times as many as were used in the conventional phase of the war. During this phase the British introduced internment in concentration camps for the Boer civilian population and also implemented a scorched earth policy. Later, the British began using blockhouses built within machine gun range of one another and flanked by barbed wire to slow the Boers' movement across the countryside and block paths to valuable targets. Such tactics eventually evolved into today's counter insurgency tactics.
The Boer commando raids deep into the Cape Colony, which were organized and commanded by Jan Smuts, resonated throughout the century as the British adopted and adapted the tactics first used against them by the Boers.
The end of World War II established the two most powerful victors, the United States of America (United States, or just the U.S.) and the Union of Soviet Socialist Republics (USSR, or just the Soviet Union) as the two dominant world superpowers.
In Southeast Asia, specifically Vietnam, the Viet Minh, NLF and other insurgencies engaged in asymmetrical guerrilla warfare with France, at first, then, later, the United States during the period of the Vietnam War (1955-1975).
The war between the mujahideen and the Soviet Armed Forces during the Soviet-Afghan War of 1979 to 1989, though claimed as a source of the term "asymmetric warfare", occurred years after Mack wrote of "asymmetric conflict". (Note that the term "asymmetric warfare" became well known in the West only in the 1990s.) The aid given by the U.S. to the mujahadeen during the war was only covert at the tactical level; the Reagan Administration told the world that it was helping the "freedom-loving people of Afghanistan". Many countries, including the US, participated in this proxy war against the USSR during the Cold War. It[clarification needed] was considered[by whom?] cost-effective and politically successful, as it caused a drain on the resources and manpower of the USSR and turned out to be a contributing factor to the collapse of that polity in 1991.
The NATO bombing of Yugoslavia (1999) during Kosovo War of 1998-1999, which pitted NATO airpower against the Yugoslav armed forces, exemplifies international conflict with asymmetry in weapons and strategy/tactics.
In October 2019 at a Workshop at RAND, Deputy Assistant Secretary of Defense Mick Mulroy publicly rolled out the Irregular Warfare Annex (IWA) to the National Defense Strategy of 2018. He explained that irregular warfare included counter-insurgency, counter-terrorism, unconventional warfare, foreign internal defense, sabotage and subversion, as well as stabilization and information operations. It had traditionally been perceived as a predominately counterterrorism (CT) effort used to fight violent extremist organizations, but that under the IWA the skills will be applied to all areas of military competition. These included competition against global powers competitors like China and Russia as well as rogue states like North Korea and Iran. Mulroy said that the U.S. must be prepared to respond with "aggressive, dynamic, and unorthodox approaches to IW", to be competitive across these priorities. He also explained that under the IWA, both special operations and conventional forces would play a key role.
The ongoing conflict between Israel and some Palestinian organizations (such as Hamas and Islamic Jihad) is a classic case of asymmetric warfare. Israel has a powerful army, air force and navy, while the Palestinian organisations have no access to large-scale military equipment with which to conduct operations; instead, they utilize asymmetric tactics, such as: knife attacks, small gunfights, cross-border sniping, rocket attacks, and suicide bombings.
The Sri Lankan Civil War, which raged on and off from 1983 to 2009, between the Sri Lankan government and the Liberation Tigers of Tamil Eelam (LTTE) saw large-scale asymmetric warfare. The war started as an insurgency and progressed to a large-scale conflict with the mixture of guerrilla and conventional warfare, seeing the LTTE use suicide bombing (male/female & child suicide bombers) both on and off battlefield mainly targeting innocent civilians; use of explosive-filled boats for suicide attacks on military shipping; and use of light aircraft targeting military installations.
The victory by the US-led coalition forces in the 1991 Persian Gulf War and the 2003 invasion of Iraq, demonstrated that training, tactics and technology can provide overwhelming victories in the field of battle during modern conventional warfare. After Saddam Hussein's regime was removed from power, the Iraq campaign moved into a different type of asymmetric warfare where the coalition's use of superior conventional warfare training, tactics and technology was of much less use against continued opposition from the various partisan groups operating inside Iraq.
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Much of the 2012-present Syrian Civil War has been fought asymmetrically. The Syrian National Coalition along with the Mujahideen and Kurdish Democratic Union Party, have been engaging with the forces of the Syrian government through asymmetric means. The conflict has seen large-scale asymmetric warfare across the country, with the forces opposed to the government unable to engage symmetrically with the Syrian government and resorting instead to other asymmetric tactics such as suicide bombings and targeted assassinations.
Like many other radical groups in southern Africa, the ANC was deeply influenced by the Cuban Revolution, in part because of its successful use of asymmetrical warfare, in part because of its transition from a grassroots, nationalist insurgency into a people's war, and in part because of the organic link made by Cuban revolutionaries between its political and military wings [...].
Until [...] 11 September 2001, the model of asymmetric war held in most analysts' minds was one far more promising for the West: Kosovo.