High Quality Content by WIKIPEDIA articles! The Soviet war in Afghanistan was a nine-year conflict involving the Soviet Union, supporting the Marxist-Leninist government of the Democratic Republic of Afghanistan against the Afghan Mujahideen and foreign "Arab-Afghan" volunteers. The mujahideen received unofficial military and/or financial support from a variety of countries including the United States, Saudi Arabia, the United Kingdom, Pakistan, Israel, Taiwan, Indonesia and China.