Final answer:
The fall of Communism and the Soviet Union itself.
Step-by-step explanation:
The major political event that was partially caused by the Soviet war in Afghanistan is the fall of Communism and the Soviet Union itself.
The Soviet invasion of Afghanistan resulted in a decade-long war between Soviet troops and Islamic rebels, some of whom were supplied by the United States. The US-backed Mujahideen resistance groups, supported by the CIA, played a significant role in defeating the Soviets.