Soviet Invasion of Afghanistan, 1979
The Soviet war in Afghanistan lasted nine years from December 1979 to February 1989. Part of the Cold War, it was fought between Soviet-led Afghan forces against multi-national insurgent groups called the Mujahideen, mostly composed of two alliances - the Peshawar Seven and the Tehran Eight. The Peshawar Seven insurgents received military training in neighboring Pakistan and China, as well as weapons and billions of dollars from the United States, United Kingdom,Saudi Arabia, and other countries.The Shia groups of the Tehran Eight alliance received support from the Islamic Republic of Iran. Early in the rule of the PDPA government, the Maoist Afghanistan Liberation Organization also played a significant role in opposition, but its major force was defeated by late 1979, prior to the Soviet intervention
If the Soviet Union let another political party come into existence, they would still be a one-party state, because everybody would join the other party.
Ronald Reagan
In Christmas 1979, Russian paratroopers landed in Kabal, the capital of Afghanistan. The country was already in the grip of a civil war. The prime minister, Hazifullah Amin, tried to sweep aside Muslim tradition within the nation and he wanted a more western slant to Afghanistan. This outraged the majority of those in Afghanistan as a strong tradition of Muslim belief was common in the country.