In addition to going after the Maya rebels, the FAG destroyed villages providing support by using bombing and napalm. By 1968 the insurgency was almost neutralized but the cost was an estimated 8,000 civilians killed, so in 1977 the US was pressured to cut off overt military aid due to human rights violations. To circumvent this, Guatemala turned to countries like Argentina, Israel and Switzerland, and the United States continued to supply dual-use aircraft and covertly provided the air force with millions of dollars in overhauls and spare parts for previously purchased aircraft. From Switzerland, twelve Pilatus PC-7 were acquired in 1979–1980 as training aircraft, but they were also used in combat during the counter-insurgency.