After winning the War of the Heavenly Horses and the Han–Xiongnu War, Chinese armies established themselves in Central Asia, initiating the Silk Route as a major avenue of international trade. Some say that the Chinese Emperor Wu became interested in developing commercial relationships with the sophisticated urban civilizations of Ferghana, Bactria, and the Parthian Empire: "The Son of Heaven on hearing all this reasoned thus: Ferghana (Dayuan ""Great Ionians"") and the possessions of Bactria (Ta-Hsia) and Parthian Empire (Anxi) are large countries, full of rare things, with a population living in fixed abodes and given to occupations somewhat identical with those of the Chinese people, but with weak armies, and placing great value on the rich produce of China" ("Hou Hanshu", Later Han History). Others say that Emperor Wu was mainly interested in fighting the Xiongnu and that major trade began only after the Chinese pacified the Hexi Corridor.