in france used for top level eventing, i think its yarland summer song a stallion used a lot for breeding, and top level dressage, totilas x trak, and many by his sire gribaldi
Two or three years ago, at an International Shagya convention in Europe, a representative of the Trakehner Stud book was present and thanked the Shagya for saving the Trakehner. I don't know the full history just that the Shagya was important for the breed survival. Today there are 10 Shagya stallions approved for entry into the Trakehner Stud book.
Yarland Summer Song is an eventing sire in France, a few years ago we saw some of his off-spring at Lion D'Angers 3 day event.