The
Han dynasty Emperor Wudi sent a huge military expedition to
Ferghana in 104 B.C. to acquire a sufficient number of "Heavenly Horses". The
Han suffered a military defeat and went home empty handed. In 102 B.C., the Chinese gathered a massive army of over 60,000 men and 30,000 horses, for a campaign to acquire "Heavenly Horses". This army crushed several villages that showed resistance, but not without suffering 50% losses. The town of Ferghana was placed under siege, and its inhabitants threatened to slaughter all of the horses, but a compromise was eventually reached, and the Chinese army would be given the best pick of the horses and food available. Roughly 30 "Heavenly Horses" were acquired, along with 3,000 horses of middling or lower quality. Sinologist
Arthur Waley in his article
The Heavenly Horses of Ferghana made the important distinction between the two types of horses that
Emperor Wu of Han had sought: the few divine ones to satisfy his spiritual needs; and the many sturdier mounts required to continuously replenish and build up his cavalry. of
Bactria and the
Dioscuri Chinese statuary and paintings, as well as the
Bactrian coin, indicate that these horses may have had legs that were proportionally short, powerful crests, and round barrels. The forelegs of the Chinese depictions are very straight, resembling the
Guoxia horse of present-day China. According to tradition, these horses sweated blood, giving rise to the name "sweats blood horse" (in ). Modern authorities believe that blood-sucking parasites caused sweat to mix with blood when the horses were worked. Modern researchers,
Mair notes, have come up with two different ideas [for the ancient Chinese references to the "Blood-sweating" horses of Ferghana]. The first suggests that small subcutaneous blood vessels burst as the horses sustained a long hard gallop. The second theorizes that a parasitic nematode,
Parafilaria multipapillosa, triggered the phenomenon.
P. multipapillosa is widely distributed across the Russian steppes and makes its living by burrowing into the subcutaneous tissues of horses. The resulting skin nodules bleed often, sometimes copiously, giving rise to a something veterinarians call "summer bleeding."
Emperor Wu of Han China (Wudi) named the horses "Heavenly Horses" ( 113 BCE) after a divination predicted their appearance. Sometime earlier
the emperor had divined by the
Book of Changes and been told that "divine horses are due to appear" from the northwest. When the
Wusun came with their horses, which were of an excellent breed, he named them "heavenly horses". Later, however, he obtained the blood-sweating horses from Dayuan [= Ferghana], which were even hardier. He therefore changed the name of the Wusun horses, calling them "horses from the western extremity", and used the name "heavenly horses" for the horses of Dayuan. After installing a new puppet King, the Han left with 3,000 horses, although only 1,000 remained by the time they reached China in 101 BCE. The Ferghana also agreed to send two Heavenly horses each year to the Emperor, and
lucerne seed was brought back to China providing superior pasture for raising fine horses in China, to provide cavalry which could cope with the
Xiongnu who threatened China. == Symbolism and Artistic Depictions ==