 Rocket attacks on Kabul's residential areas caused more than 4000 civilian deaths in 1987 according to the UN's Ermacora.Along with fatalities were 1.2 million Afghans disabled (mujahideen, government soldiers and noncombatants) and 3 million maimed or wounded (primarily noncombatants).Irrigation systems, crucial to agriculture in Afghanistan's arid climate, were destroyed by aerial bombing and strafing by Soviet or government forces.