 The first order was for 36 Arado Ar 65 fighters, 197 Arado Ar 66 trainers, and 71 Heinkel He 51 fighters.The first of these to fly was an Ar 65s, on 1 May 1935.This was followed by an order for 140 Henschel Hs 123 dive-bombers delivered at the end of 1937, AGO's introduction to all-metal construction.