Cactus Air Force refers to the ensemble of Allied air power assigned to the island of Guadalcanal from August 1942 until December 1942 during the early stages of the Guadalcanal Campaign, particularly those operating from Henderson Field. After December, the official name of the unit became Commander, Aircraft, Solomons (AirSols), but Cactus Air Force was still used frequently to refer to the organization. The term "Cactus" comes from the Allied code name for the island. In April 1943 the organization was redesignated as AirSols.