In July 1958, a coup brought Phoumi Nosavan to power in Laos; he subsequently requested additional aid from the United States. By the following year, PEO planned to reinforce the Lao air force with six North American T-28 Trojans. It also became apparent that the aviation support available for the Royalist government's war against the Communists was insufficient, even when augmented by Air America contract flights. The U.S. Air Force 315th Air Division sent a detachment incountry dressed in civilian clothing on a month's temporary duty to operate C-119G Flying Boxcars, C-123 Providers, and C-130 Hercules transports in support of the Royalists. After they flew 72 sorties, they were withdrawn on 27 April 1959 because of international political pressure.Retrieved 17 December 2010.
