Kepel, Gilles (2002). 《Jihad: The Trail of Political Islam》. Belknap Press of Harvard University Press. 143쪽. By 1982 the jihad was receiving $600 million in U.S. aid per year, with a matching amount coming from the Gulf states.
According to Milton Bearden, former CIA chief in charge of the Afghan department, "The Saudi dollar-for-dollar match with the US taxpayer was fundamental to the success [of the ten-year engagement in Afghanistan]" (from Milton Bearden Interview. PBS Frontline.)
