Seasoned soldier and scholar of military science, Jehan Morel introduces us to the world of guerilla and counter-guerilla warfare in a captivating book that is part practical handbook and part historical examination of the major contemporary geopolitical movements. Relying on his first-hand counter-insurgency experience in Indochina and Central Africa and on his encyclopedic knowledge of asymmetric warfare, this thoroughly researched work gives us an inner glimpse of their actual nature. A world where the strong fervor and boldness of rebels need to be supported by clarity of purpose, strategic planning and perfect execution to achieve their goals: proclaiming the independence of a country under occupation, overthrowing the country's regime or beating a foreign invading army through a war of attrition. Counter-guerilla warfare is also subjected to the same methodical examination that provides the ideal structural foundation of its organization and the recommended astute to eradicate an insurgency. Its reading gives to the reader the details of the ideal organizations of guerilla and counter-guerilla alike; the infrastructure and resources needed to support their actions; as well as the minutiae of their typical operations (attack of an outpost, headquarters, a military parade, a patrol; a prison raid, a road or river convoy ambush, jungle combat, urban guerrilla, street fighting ...). It takes us to the "hidden" theaters of war that play major roles in a guerrilla: funding, intelligence, deception, psychological, penetration of the enemy, cyber warfare, communications, all of them key components that affect the issue of the conflict, yet are usually overlooked in favor of the more "news-friendly" martial aspect of war. It takes us to the discovery of the true decisive factor of the success of guerilla or counter-guerilla operations: winning the heart and minds of the local population, whose support is essential and which bestows legitimacy to the "cause." Securing that support requires outlining clear rules of engagements, having a drastic code of justice and ensuring harmonious relationships between the guerilla (or counter-guerilla) operatives and the local population. Then, taking a step back from the day-to-day cycle of actions and retaliations, the author provides an in-depth analysis of the major geopolitical and geostrategic upheavals of our era, from the war of Indochina and the bloody "events" of Algeria, according to the official language-to today's ISIS operations in Iraq and Syria, from the Colombian FARCs and ELN, the Indian Naxalites to the Ugandan LRA. Providing contextual analysis and historical background to each of these, he points out the failures of his own indecisive country in the regions where he was operating, brings a magnifying glass to the myriad of conflicts of local or global importance, retraces their roots (ethnic rivalries, political enmities, religious fundamentalism, money) and elucidates their stakes. Jehan Morel give us a fascinating book that is realistic about the present and pessimistic about the future.