The guerrilla epidemic -- Troubled new world -- The nature of unconventional war -- Urban insurrection -- Sabotage and espionage - Military technology and the guerrilla -- The communist approach to unconventional war -- The government under unconventional attack -- The government under unconventional attack: some political problems -- Foreign support of insurrection: in free countries -- Foreign support of insurrection: behind the curtains -- Foreign support in insurgency -- International cooperation in unconventional war -- Conclusion.