Vietnam differed from Korea and Malaya, where containment and counterinsurgency prevailed, because the communists could outflank allied forces in South Vietnam by using “neutral” territory in Cambodia and Laos. Like the PLO presence in Lebanon until 1982, this strategy plunged hapless host countries into civil war and provoked invasions by stronger powers, in turn spurring more extremist movements – the Khmer Rouge, Hezbollah, and Islamic Jihad.