[benque]

Start from here - https://en.wikipedia.org/wiki/Operation_Storm-333

(Hint - It was the Soviets who went with their guns blazing to Kabul setting off a series of events causing instability.)

Beyond that, your reading comprehension isn't good enough for further arguments.

[quetzthecoatl]

No it was the US with the help of Pakistan. See - /dev/null.