 Bolero was by the English Thoroughbred stallion Black Sky, who was imported to Germany in 1972.Black Sky was a grandson of the great stallion Djebel, who also sired the very influential My Babu, a stallion seen in many show jumpers osdand hunters pedigrees in the United States.Black Sky stood at the private stud farm of Schmidt-Ankum, and his offspring were generally talented dressage horses with good rideability, but with very little jumping talent.