Why did rural Afghans move to Kabul after the Soviet invasion in 1979?

Following the Soviet invasion of Afghanistan in 1979, rural Afghans migrated to Kabul primarily to seek refuge from the brutal conflict and the widespread destruction of the countryside.12

As the Afghan War intensified, Soviet forces attempted to suppress the mujahideen insurgency by bombing and depopulating rural areas. While millions of Afghans fled the country to Iran or Pakistan, many others sought safety within the capital, which was under the control of Soviet troops. This influx of displaced people was significant; by the time Soviet forces withdrew in 1989, nearly three-fourths of Kabul’s population resided in informal settlements, often built on government-owned land with only rudimentary services.321