Les Fusées traces the millennial history of reaction propulsion, from Chinese origins to modern pioneers (Esnault-Pelterie, Goddard, Oberth, Tsiolkovsky). Building on this historical foundation, subsequent chapters cover German World War II achievements (V-2, Baka kamikaze aircraft), the technical principles of solid, liquid, and nuclear propulsion, guidance systems, and thermal resistance. The work then surveys the missile arsenals of the major powers (United States, USSR, United Kingdom, France) around 1960, before opening onto nascent astronautics: artificial satellites, interplanetary travel, and the prospects of ionic propulsion.