A. 24 December 1974
B. 24 December 1977
C. 24 December 1979
D. 24 December 1981
The Soviet–Afghan War lasted over nine years, from December 1979 to February 1989. Insurgent groups known collectively as the mujahideen, as well as smaller Maoist groups, fought a guerrilla war against the Soviet Army and the Democratic Republic of Afghanistan government, mostly in the rural countryside. Wikipedia