Oh nonsense, it fell into civil war the day they left. The Soviet Occupation ended on 15 February 1989, and the Afghan Civil War started on 15 February 1989.
That lasted until 1992, when the Peshawar Accords were signed. And the ink was not even dry on those accords, when yet another Civil War broke out. This time from 1992-1996, commonly called the "Second Afghan Civil War", for rather obvious reasons.
That lasted until 1996, when the Taliban declared it had won. However, that only resulted in the "Third Afghan Civil War", that lasted from 1996-2001 when the Taliban were kicked out of power.
What, do you really believe that the government was really stable from 1989 until 1996? What do you think the Peshawar Accords were about in the first place? The closest there was to a Government did not even exist until 1992.
Dude, you should really give up on trying to give propaganda, you absolutely suck at it. Because you know, some of us actually do know about that era of Afghanistan, and remember what was going on then.