What is napalm

Last updated: April 1, 2026

Quick Answer: Napalm is an incendiary mixture of flammable substances (typically gasoline, benzene, and thickening chemicals) developed during World War II, historically used as a military weapon in aerial bombing campaigns.

Key Facts

What is Napalm?

Napalm is an incendiary weapon consisting of a flammable mixture of fuel and thickening agents. The term originally referred to a specific formulation but now generally describes any similar incendiary weapon. Napalm works by creating a thick, sticky substance that adheres to surfaces and burns at extremely high temperatures. When deployed, it spreads over a wide area, igniting everything combustible and creating intense heat that can cause severe burns, lung damage from oxygen depletion, and massive destruction of infrastructure. Its use has generated significant humanitarian concerns due to the indiscriminate nature of incendiary weapons.

Chemical Composition and Development

The original napalm formulation was developed by chemists at Harvard University during World War II. The name comes from naphthenic acid and palmitic acid, two key ingredients in the original recipe. The formula typically consisted of gasoline thickened with a mixture of chemicals including aluminum naphthenate and aluminum palmitate. These chemicals transformed liquid gasoline into a sticky, gelatinous substance that adhered to surfaces and burned for extended periods. Modern napalm variants have different chemical compositions but serve the same incendiary purpose. The development of napalm was driven by military objectives to create more effective area denial and incendiary weapons.

Historical Military Use

Napalm was first developed and operationally deployed during World War II. The U.S. military used napalm in firebombing campaigns against Japanese cities and military installations, particularly during island-hopping campaigns in the Pacific. The incendiary weapon became particularly notorious for its use in the Vietnam War, where American forces extensively employed napalm against North Vietnamese and Viet Cong positions. The iconic photograph of the napalmed girl running from a napalmed village became one of the most powerful images of the Vietnam War. Napalm was used by both conventional bombing and from helicopters and ground forces. The weapon's use in Vietnam prompted international humanitarian concerns that continue to this day.

Effects and Impact

Napalm's effects are devastating and indiscriminate. The substance burns at temperatures exceeding 800°C, causing severe thermal burns to human tissue at great distances. Napalm also creates intense heat that can ignite secondary fires over wide areas, destroying buildings, vegetation, and infrastructure. The deployment of napalm creates oxygen-depleted zones that can cause asphyxiation. Its effects persist in the environment, contaminating soil and water. Victims of napalm suffer severe burn injuries, many requiring long-term medical care. The indiscriminate nature of napalm means it affects combatants and civilians alike, raising significant humanitarian concerns.

International Restrictions

Due to humanitarian concerns about napalm's indiscriminate effects, the international community has established restrictions on its use. Protocol III of the Convention on Certain Conventional Weapons restricts the use of incendiary weapons, including napalm, in civilian areas or when civilian presence is likely. Many nations have signed and ratified this protocol, though notably the United States signed but did not ratify it. Despite international restrictions, napalm and similar incendiary weapons continue to be used in modern conflicts, though often in ways that purport to comply with international law. The distinction between legitimate military targets and civilian areas remains contested in practice.

Related Questions

Why was napalm used in wars?

Napalm was used militarily because it is highly effective at destroying buildings, equipment, and large areas quickly. Its ability to adhere to surfaces and burn intensely made it valuable for area denial and destroying entrenched positions. Military planners believed it provided tactical advantages despite the humanitarian costs.

How does napalm work?

Napalm is a sticky incendiary mixture that adheres to surfaces and burns at extremely high temperatures (800-1,200°C). When ignited, it creates intense heat that ignites surrounding materials, causes thermal injuries over wide areas, and depletes oxygen in the surrounding environment.

Is napalm still used today?

Napalm and similar incendiary weapons have been used in various recent conflicts, though international law restricts their use against civilians. Technically modified versions may be used by some military forces, but the use of napalm-type weapons remains controversial and subject to international humanitarian law restrictions.

Sources

  1. Wikipedia - Napalm CC-BY-SA-4.0
  2. Britannica - Napalm Fair Use