This book provides succinct accounts of 21 guerrilla conflicts in the twentieth century. The wars covered include the Boer War, the Philippine War, World War I, the Russian Revolution, World War II, Vietnam, the Algerian War, the Afghan-Soviet War, and more. It covers the exploits of men like Lawrence of Arabia, Orde Wingate, Mao Zedong, and Che Guevera. In war, whenever one side outnumbers and outguns the other, the outnumbered and outgunned side often resorts to guerrilla warfare to address the asymmetry and frequently achieves victory. The twentieth century produced scores of such conflicts, whether as side-shows of the world wars or as the main events in wars of revolution or liberation. "Guerrilla Warfare" examines twenty-one of these conflicts, shedding light on the remarkable capabilities of unconventional fighters to outlast and defeat their enemies.