Afghan exodus after the Soviet invasion (1979-1989)
The Soviet invasion in December 1979 sent up to six million Afghans fleeing to Pakistan and Iran, then the world's largest refugee population. Border camps in Pakistan grew into permanent settlements over a decade of war.
Refugees survived on international aid while mujahideen factions fought Soviet forces from Pakistani soil.
Three generations were born and raised outside Afghanistan, many never setting foot in the country. That population is the one now being pushed back.
Today's six million returns roughly mirror the original exodus in scale, but they move into a far weaker state, under the same Taliban movement many original refugees fled.
