Hikoki, Ottringham, 1st ed., 2000. 240 pp., cold., ills., + numerous b&w photo-ills. D.j., 30 x 21cm. FINE. It was during the Spanish Civil War that the concept of Blitzkrieg was first tried out by the German volunteers of the Legion Condor, which formed a major air component of the Spanish rebel forces. This was a revolutionary all-arms formation, self-contained and always controlled by airmen. Here the likes of Galland, Molders and Trautloft earned their spurs. Here, too, the Bf 190, He 111, Do 17 and the infamous Ju 87 had their baptism of fire. It was, in effect, the opening rounds of World War II. Using much new, previously undiscovered source material, this excellent study looks in detail at the men, machines and units which formed the Legion Condor.