To what extent did CIA support for the mujahideen (via weapons and stinger missiles) alter the Soviet war in Afghanistan? Could the mujahideen have defeated the Soviet Union without this assistance? Why or why not?

To what extent did CIA support for the mujahideen (via weapons and stinger missiles) alter the Soviet war in Afghanistan? Could the mujahideen have defeated the Soviet Union without this assistance? Why or why not?