Condor: The Luftwaffe in Spain (Stackpole Military History Series)

In 1936, civil war broke out in Spain, a violent prelude to World War II. Germany and the Soviet Union clashed there by proxy, with Hitler supporting Franco's Nationalists and Stalin aligning with the Republicans. The Third Reich sent the Condor Legion, a unit composed primarily of Luftwaffe forces, and the conflict became a proving ground for concepts like blitzkrieg, for officers like Adolf Galland and Werner Mölders, and for aircraft like the Bf 109, He 111, and Ju 97. Chillingly, the war also saw the development of terror bombing.