information:extraction, linguistic:voice_change
Soviet invasion of Afghanistan (1979–1989)

In 1979, the Soviet Union deployed its 40th Army into Afghanistan, attempting to suppress an Islamic rebellion against an allied Marxist regime in the Afghan Civil War. The conflict, pitting indigenous impoverished Muslims (mujahideen) against an anti-religious superpower, galvanized thousands of Muslims around the world to send aid and sometimes to go themselves to fight for their faith. Leading this pan-Islamic effort was Palestinian 'alim Abdullah Yusuf Azzam. While the military effectiveness of these " Afghan Arabs " was marginal, an estimated 16,000 to 35,000 Muslim volunteers came from around the world to fight in Afghanistan.

When the Soviet Union abandoned the Marxist Najibullah regime and withdrew from Afghanistan in 1989 (the regime finally fell in 1992), the victory was seen by many Muslims as the triumph of Islamic faith over superior military power and technology that could be duplicated elsewhere.

The jihadists gained legitimacy and prestige from their triumph both within the militant community and among ordinary Muslims, as well as the confidence to carry their jihad to other countries where they believed Muslims required assistance.

The collapse of the Soviet Union itself, in 1991, was seen by many Islamists, including Bin Laden, as the defeat of a superpower at the hands of Islam. Concerning the $6 billion in aid given by the US and Pakistan's military training and intelligence support to the mujahideen, bin Laden wrote: "he US has no mentionable role" in "the collapse of the Soviet Union... rather the credit goes to God and the mujahidin " of Afghanistan.