Avia B-534 was Czech-built fighter. German forces captured about 350 planes (including Bk-534). These were concentrated at the airfields of Merseburg, Erding near Munich and several others, whence they were distributed to Luftwaffe units and offered to the satellite states. Luftwaffe organized a conversion course (so-called Avia Lehrgang) in Herzogenaurach. The ex-Czechoslovak fighters were used mainly as training machines with A/B Schulen and the Jagdfliegerschulen both on German and occupied soil.