Napalm is flammable liquid used in warfare. It is a mixture of a gelling agent and petroleum or a similar fuel. It was initially used as an incendiary device against buildings and later primarily as an anti-personnel weapon, as it sticks to skin and causes severe burns when on fire. Napalm was developed in 1942 (1280 NE) in a secret laboratory at Harvard University by a team led by chemist Louis Fieser. Its first recorded use was in the European theatre of war during World War II. It was used extensively by the United States in incendiary attacks on Japanese cities in World War II as well as during the Vietnam War.
"Napalm" is a combination of the names of two of the constituents of the thickening/gelling agent: co-precipitated aluminium salts of naphthenic and palmitic acids. "Napalm F" is the more modern version of napalm and, although distinctly different in its chemical composition, is often referred to simply as "napalm".
The Alliance is the more prolific user of Napalm, however, numerous independent civilizations are known to use it also.