Vietnam War: Nine-year-old Phan Thị Kim Phúc is burned by napalm, an event captured by Associated Press photographer Nick Ut moments later while the young girl is seen running naked down a road, in what would become an iconic, Pulitzer Prize-winning photo.

The Vietnam War was an armed conflict in Vietnam, Laos, and Cambodia fought between North Vietnam and South Vietnam and their allies. North Vietnam was supported by the Soviet Union and China, while South Vietnam was supported by the United States and other anti-communist nations. The conflict was the second of the Indochina wars and a proxy war of the Cold War between the Soviet Union and US. The Vietnam War was one of the postcolonial wars of national liberation, a theater in the Cold War, and a civil war, with civil warfare a defining feature from the outset. Direct US military involvement escalated from 1965 until its withdrawal in 1973. The fighting spilled into the Laotian and Cambodian Civil Wars, which ended with all three countries becoming communist in 1975.

Phan Thị Kim Phúc, referred to informally as the girl in the picture and the napalm girl, is a South Vietnamese-born Canadian woman best known as the child depicted in the Pulitzer Prize–winning photograph, titled The Terror of War, taken at Trảng Bàng during the Vietnam War on June 8, 1972.

Napalm is an incendiary mixture of a gelling agent and a volatile petrochemical. The name is a portmanteau of two of the constituents of the original thickening and gelling agents: coprecipitated aluminium salts of naphthenic acid and palmitic acid. A team led by chemist Louis Fieser originally developed napalm for the US Chemical Warfare Service in 1942 in a secret laboratory at Harvard University. Of immediate first interest was its viability as an incendiary device to be used in American fire bombing campaigns during World War II; its potential to be coherently projected into a solid stream that would carry for distance resulted in widespread adoption in infantry and tank/boat mounted flamethrowers as well.