 This trend would not continue, and by the summer of 1990, the Afghan government forces were on the defensive again.By the beginning of 1991, the government controlled only 10 percent of Afghanistan, the eleven-year Siege of Khost had ended in a mujahideen victory and the morale of the Afghan military finally collapsed.It didn't help that the Soviet Union was falling apart itself; hundreds of millions of dollars of yearly economic aid to Najibullah's government from Moscow dried up.