quoted from that article:
"With the end of the war, the military abandoned the airbases and stopped dropping cargo. In response, charismatic individuals developed cults among remote Melanesian populations that promised to bestow on their followers deliveries of food, arms, Jeeps, etc. The cult leaders explained that the cargo would be gifts from their own ancestors, or other sources, as had occurred with the outsider armies. In attempts to get cargo to fall by parachute or land in planes or ships again, islanders imitated the same practices they had seen the soldiers, sailors, and airmen use. Cult behaviors usually involved mimicking the day-to-day activities and dress styles of US soldiers, such as performing parade ground drills with wooden or salvaged rifles.[14] The islanders carved headphones from wood and wore them while sitting in fabricated control towers. They waved the landing signals while standing on the runways. They lit signal fires and torches to light up runways and lighthouses.[citation needed]
In a form of sympathetic magic, many built life-size replicas of aeroplanes out of straw and cut new military-style landing strips out of the jungle, hoping to attract more aeroplanes. The cult members thought that the foreigners had some special connection to the deities and ancestors of the natives, who were the only beings powerful enough to produce such riches.
Cargo cults are typically created by individual leaders, or big men in the Melanesian culture, and it is not at all clear if these leaders were sincere, or were simply running scams on gullible populations. The leaders typically held cult rituals well away from established towns and colonial authorities, thus making reliable information about these practices very difficult to acquire."
