A cargo cult is a religious practice that has appeared in many traditional tribal societies in the wake of interaction with technologically advanced cultures. The cults focus on obtaining the material wealth (the "cargo") of the advanced culture through magic and religious rituals and practices. Cult members believe that the wealth was intended for them by their deities and ancestors. Cargo cults developed primarily in remote parts of New Guinea and other Melanesian and Micronesian societies in the southwest Pacific Ocean, beginning with the first significant arrivals of Westerners in the 19th century. Similar behaviors have, however, also appeared elsewhere in the world.
Cargo cult activity in the Pacific region increased significantly during and immediately after World War II, when the residents of these regions observed the Japanese and American combatants bringing in large amounts of material. When the war ended, the military bases closed and the flow of goods and materials ceased. In an attempt to attract further deliveries of goods, followers of the cults engaged in ritualistic practices such as building crude imitation landing strips, aircraft and radio equipment, and mimicking the behaviour that they had observed of the military personnel operating them.