|Chanyu of the Xiongnu Empire|
|Reign||c. 220–209 BCE|
The name Touman is likely related to a word meaning '10,000, a myriad', which was widely borrowed between language families in, most plausibly, the order indicated by the following representative list of its forms: Modern Persian (which includes the Tajik and Dari dialects of it) tōmān ~ tūmān, Mongolian tümen, Old Turkic tümän, East Tocharian tmāṃ, West Tocharian t(u)māne, which possibly even includes Old Chinese and later 萬, whose pronunciation can be reconstructed as for instance an early Middle Chinese *muanʰ. Note however that our only certain evidence this number-word already existed around and before Touman's lifetime would be the Chinese; not until many centuries after he lived are the other languages with this word in them first attested.
By the time the Qin dynasty had conquered the six Warring States and began its reign over a unified China in 221 BCE, the nomadic Xiongnu had grown into a powerful force in the north and started expanding both east and west. According to Sima Qian, there was a long line of Xiongnu leaders preceding Touman's son, but only from the start of his reign did information become available to historians in China. Competing with the Xiongnu for supremacy were the Dōnghú (東胡) or 'Eastern Barbarians' and the Yuezhi. In 215 BCE, Qin Shi Huang, the first emperor of China, sent a 300,000-strong army headed by General Meng Tian into the Ordos region and drove the Xiongnu northward for 1,000 li (about 416 km).
"Touman, unable to hold out against the Qin forces, had withdrawn to the far north, where he held out for over ten years."
Touman favored a younger son from another concubine. To get rid of his eldest son, Modu (冒頓), Touman sent him to the Yuezhi as a hostage, and then made a sudden attack on them. In retaliation the Yuezhi prepared to kill Modu, but he managed to steal a horse and escape back to the Xiongnu. Touman was impressed with his bravery and put Modu in command of a force of 10,000 horsemen. Modu was very successful in training his men to obey him absolutely. In 209 BCE, Modu commanded his men to shoot his father, killing him as well as his stepmother, younger brother, and the high officials who refused to take orders from him. Thereafter Modu became chanyu.
The Book of Han (juan 94's "upper" section) recounts the end of Touman’s life in vivid language, as follows (literal English translation, then the Classical Chinese).
... The chanyu[, Touman,] had a son and heir, by name called Modu. Later, he had a beloved yanzhi [i.e. queen], who gave birth to a younger son. Touman wanted, casting aside Modu, to install the young son [in the position]. He managed to send Modun as a hostage to the Yuezhi. Upon Modu having become a hostage, Touman quickly attacked the Yuezhi. The Yuezhi wanted to kill Modu. Modu stole their good horses, rode, went away, and returned home. Touman took it as a show of strength and ordered that he have command of 10,000 riders. Modu managed to make whistling arrowheads and with them training his riders to shoot. He gave an order, saying: "Those who do not always shoot at something shot at by an arrow with a whistling arrowhead will be beheaded." He conducted hunting for game-animals. He had some not shooting at something the whistling arrowhead(s) [had] shot at, and he on the spot beheaded them. That being done, Modu with a whistling arrowhead shot at a good horse of his own. At [his] left and right, some did not at all dare to shoot. Modu straightaway beheaded them. [Next,] he waited, a while passed, [then,] again with a whistling arrowhead, he shot at his own beloved wife. At [his] left and right, he had some who were quite afraid and did not dare shoot, and he again beheaded them. A while passed. Modu went out hunting. With a whistling arrowhead, he shot at a good horse of [Touman,] the chanyu's. At [his] left and right, all shot at it. Modu thereupon knew that his left and right could be used [for the task]. He went along on a hunt of his father, the chanyu, Touman's, and with a whistling arrowhead shot at Touman. His left and right, all following the whistling arrowhead, shot at and killed Touman. They put to death both his stepmother and the younger brother and even some important retainers who did not obey and go along. Modu thereupon installed himself and became chanyu.
- Grousset, Rene (1970). The Empire of the Steppes. Rutgers University Press. pp. 26–27. ISBN 0-8135-1304-9.
- Steingass (1892), p. 337.
- Doerfer (1963-1975), vol. II, pp. 983 ff., and Beckwith (2009), pp. 387–388, n. 10; p. 390, n. 17, to cite only a very authoritative source and a recent one (respectively) among many that have discussed this borrowing.
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- Watson (1993), p. 133.
- Watson (1993), p. 134.
- Loewe 2000, p. 514.
- Watson, Burton. (1993). Records of the Grand Historian by Sima Qian. Translated by Burton Watson. Revised Edition. Columbia University Press. ISBN 0-231-08167-7.
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- Yap, Joseph P. (2009). Wars With The Xiongnu, A Translation from Zizhi tongjian. AuthorHouse, Bloomington, Indiana, U.S.A. ISBN 978-1-4490-0604-4. Introduction and Chapter 2.
- Doerfer, Gerhard (1963-1975). Türkische und Mongolische Elemente im Neupersischen. 4 vols. Wiesbaden: Franz Steiner. OCLC accession number 01543707 on Worldcat.org, where no ISBN found.
- Ban Gu 班固. (89 AD). Han shu 漢書.
- Loewe, Michael (2000), A Biographical Dictionary of the Qin, Former Han, and Xin Periods, Brill
- Steingass, Francis Joseph. (1892; Fifth Impression, 1963; ...). A Comprehensive Persian-English Dictionary. London: Routledge & Kegan Paul Limited.