One lesson bin Laden learned from the war against the Soviets was the importance of his enemy's economy. The Soviet Union didn't just withdraw from Afghanistan in ignominious defeat, but the Soviet empire itself collapsed soon thereafter, in late 1991. Thus, bin Laden thought that he hadn't just bested one of the world's superpowers on the battlefield, but had actually played an important role in its demise. It is indisputable that the Soviet withdrawal from Afghanistan did not directly collapse the Soviet Union; the most persuasive connection that can be drawn between that war and the Soviet empire's dissolution is through the costs imposed by the conflict.
Indeed, bin Laden has spoken of how he used "guerrilla warfare and the war of attrition to fight tyrannical superpowers, as we, alongside the mujahidin, bled Russia for ten years, until it went bankrupt." He has compared the United States to the Soviet Union on numerous occasions -- and these comparisons have been explicitly economic. For example, in October 2004 bin Laden said that just as the Arab fighters and Afghan mujahidin had destroyed Russia economically, al Qaeda was now doing the same to the United States, "continuing this policy in bleeding America to the point of bankruptcy." Similarly, in a September 2007 video message, bin Laden claimed that "thinkers who study events and happenings" were now predicting the American empire's collapse. He gloated, "The mistakes of Brezhnev are being repeated by Bush."
