However, on October 3, 1968, a military junta led by pro-Soviet Peruvian Army General Juan Velasco Alvarado organized a swift and bloodless coup d'état against president Fernando Belaúnde Terry. Velasco aligned Peru more closely with the Soviet Bloc and relations with the United States deteriorated. The US declared an arms embargo in 1969, making it difficult to obtain spare parts for Peru's American weaponry. In the 1970s and 1980s, Peru turned to the Soviet Union for its military hardware. During this time, the FAP acquired several Soviet-made aircraft, including Sukhoi Su-22 fighters, Antonov An-26 and An-32 transport aircraft, as well as Mil Mi-8, Mi-17, Mi-25 and Mi-26 helicopters. Soviet advisors were also dispatched to Peru.