By the outbreak of World War 2, the Luftwaffe had acquired effective tactical battlefield experience from its involvement in the Spanish Civil War in 1936-1939, centered around the operations conducted by the Legion Condor, a force of some 19,000 'volunteer' German airmen, staff, technicians and groundcrew formed into fighter, bomber, reconnaissance, Flak, weather and signals elements. In this new book, author Robert Forsyth, renowned expert on World War 2 German aviation, details the development of both the technologies and the pilots of this German air force, with full-color illustrations, plates and details of color schemes used within the Legion Condor. From the He 51 to the Messerschmitt, from flying in close wing-to-wing formations to the looser, wider formations common to the Luftwaffe during World War 2, this book is a must-have for any German aviation historian or modeler.