Answer :
The united states participated in the soviet-afghan war as it provided weapons to the mujahideen rebels.
This is further explained below.
What is soviet-afghan war?
Generally, Invading Afghanistan on December 24, 1979, the Soviet Union said it was doing so to honor the Soviet-Afghan Friendship Treaty of 1978.
In conclusion, The United States supported the mujahideen rebels in the Soviet-Afghan War by providing them with weaponry.
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