Like the USA later did in Vietnam, British troops sometimes set fire to villages whose inhabitants were accused of supporting the insurgents, detaining thousands of suspected collaborators, and to deny the insurgents cover. British units that discovered civilians providing assistance to insurgents were to detain and interrogate them, using torture and the threat of violence against family members, to discover the location of insurgent camps. Insurgents had numerous advantages over British forces; they lived in closer proximity to villagers, they sometimes had relatives or close friends in the village, and they were not afraid to threaten violence or torture and murder village leaders as an example to the others, forcing them to assist them with food and information. British forces thus faced a dual-threat: the insurgents and the silent network in villages who supported them. British troops often described the terror of jungle patrols; in addition to watching out for insurgent fighters, they had to navigate difficult terrain and avoid dangerous animals and insects. Many patrols would stay in the jungle for days, even weeks, without encountering the MNLA guerrillas. This strategy led to the infamous incident at Batang Kali where 24 unarmed villagers were executed by British troops.