 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.By the late 1970s the insurgency had been reborn as a mostly Maya peoples rebellion organized around four Maoist-oriented rebel groups, mostly the Guerrilla Army of the Poor.