Asymmetric warfare

Asymmetric warfare describes a conflict between two sides with very different levels of power. In these struggles, the belligerents—the people or groups fighting—have significantly different military strategies, tactics, or relative power. One side often possesses massive material power, such as large armies, sophisticated weapons, and advanced economies. The opposing side is usually much weaker in these areas. This weaker side often consists of insurgents, terrorist groups, or resistance militias. These groups frequently operate within territory that a superior force mostly controls.

In symmetrical warfare, two powers have comparable resources and use similar tactics. Asymmetric warfare is different because the weaker side must use unconventional methods to offset its lack of equipment or soldiers. Military analysts often use this term as an umbrella for many different types of conflict. These include guerrilla warfare, insurgency, rebellion, and terrorism. Some scholars also view it as a component of fourth generation warfare. The term became popular following Andrew J. R. Mack's 1975 article, "Why Big Nations Lose Small Wars." Mack argued that a significant disparity in material power defines these engagements. While his work was ignored at first, interest grew after the Cold War ended and again after 9/11.

Academic researchers often study two main puzzles regarding these conflicts. First, they ask why weaker actors choose to fight much more powerful ones. Possible reasons include having secret weapons or powerful allies. It may also be that a stronger actor cannot make their threats believable. Sometimes, the demands of a strong actor are simply too extreme. The second puzzle asks why the "weak" can actually defeat the "strong." This can happen through strategic interaction or external support. The weaker side may also be more willing to bear higher costs or suffer more. Additionally, a strong actor might be reluctant to escalate violence or may have goals that are too large.

Tactical success in asymmetric warfare relies on specific strategic assumptions. One side may use technology to outweigh an enemy's numerical advantage. For example, the English longbow was a decisive technology at the Battle of Crécy. However, technological superiority can be cancelled by vulnerable infrastructure. Targeting electric lines, roads, or water supplies can devastate an economy and morale. The weaker side might also use training and specific tactics to overcome a larger force. For centuries, the Greek hoplite used the phalanx formation to gain an advantage. The Battle of Thermopylae is a famous example of using both tactics and terrain effectively.

Terrain acts as a "force multiplier" for smaller groups. Difficult terrain, such as mountains and forests, limits the mobility of larger armies. Urban areas also provide many defensible positions and escape routes. In the 12th century, the Assassins used mountaintop fortresses like Alamut Castle to stay secure. During the American Revolutionary War, Francis Marion, known as the "Swamp Fox," used the South Carolina wilderness to hinder British forces.

In 1941, Yugoslav Partisans used rough mountains to fight German occupation forces. They started as small detachments but grew into a regular army over four years.

The Vietnam War provides a classic example of using terrain and tunnels. The North Vietnamese army (NVA) and Viet Cong (VC) used forests to hide troop movements. This allowed them to move despite superior American air power. The United States used defoliation methods like Agent Orange and Napalm to clear forests for visibility.

The NVA and VC also used the Củ Chi tunnels to move and store supplies undetected. These intricate systems helped them evade many search-and-destroy missions.

Civilians play a vital role in the outcome of these wars through information sharing. In an "information-central framework," civilians are seen as sources of strategic data. They might provide tips on the timing or location of insurgist activity. This can undermine resistance if the information is shared with the government. The framework suggests that providing services and security can reduce violence and encourage cooperation. However, civilian casualties can reduce support for the group committing the violence. Finally, some conflicts are conducted as "war by proxy." This occurs when a nation uses non-governmental actors to fight for its interests. This method allows the state actor to maintain deniability for their actions.