Contrary to their contemporary image, deniable covert operations are not something new. Such activities have been ordered by every president and every administration since World War II. Clandestine operations have often relied on surrogates, with American personnel involved only at a distance, insulated by layers of deniability.Shadow Warfare traces the evolution of these covert operations, detailing the tactics and tools used from the Truman era through those of the contemporary Obama administration. It also explores the personalities and careers of many of the most noted shadow warriors of the past sixty years, tracing the decades-long relationship between the CIA and the military.Shadow Warfare offers a balanced, non-polemic exploration of American concealed warfare, detailing its patterns, consequences, and collateral damage, and presenting its successes as well as its failures. Hancock and Wexler explore why every president, from Franklin Roosevelt on, felt compelled to turn to secret, deniable military action. It also delves into the political dynamic of the president's relationship with Congress, and the fact that despite decades of warfare, Congress has chosen not to exercise its responsibility to declare a single state of war even for extended and highly visible combat.