The military doctrine of low-intensity conflict draws on counterinsurgency strategy of the early Vietnam War years, lessons from experiences in Lebanon, Central America, the Falklands war, and Afghanistan. In addition to counterinsurgency activity "pro-insurgency" (support of anti-government insurgents), counterterrorism, narcotics interdiction and police operations of the type used by the USA in Grenada. Specially trained units are developed and prepared for rapid deployment.