The Soviets often dealt brutally with rebels hiding in caves, using flame-throwers among other things. In 1982, Soviet troops found Afghans hiding in a karez in Logar Province, in eastern Afghanistan. Wearing gas masks, the Soviets poured gasoline, diesel fuel and an incendiary white powder into the tunnel and set it alight, incinerating 105 men, women and children, Jalali and military analyst Lester Grau wrote in a history of the mujahedin-Soviet war.
Thats exaclty what we need to do to every single cave.