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Central and northern asia (see map this same section, next chapter)

Back to Central and Northern Asia: 1101 to 1200

At the turn of the century Ali-ad-Din came to the throne of Khwarizm as Muhammad II and he soon added southern Khurasan and its peaceful Persians to his empire. To the east was the Tranoxiana Empire and to the northeast of that the powerful Buddhist Empire of Kara Khitae, screening Islam from the new power developing in Mongolia around Karakorum. It was in 1206 that Temujin, leader of the Yakka tribe of Mongolians of the Gobi desert, in council with other tribal leaders of the region, took the title of Genghis

As noted in the introductory material, the spelling of this name varies with the source - Jenghis, Ginghis, Genghis, Ghingis etc.)
Khan (meaning "Lord of the Earth") and started to lead his soldiers south. (Ref. 137 ) As the Mongols conquered Kara Khitai, Ali-ad-Din took Transoxiana with its great wealth and its 500,000 people. (Ref. 27 ) Additional Notes

It was the normal procedure of the Mongols to send emissaries ahead, bearing lavish gifts and suggesting trade, with new regions. Thus, before attacking Khwarizm in 1220, Mongolian merchants arrived with 500 camels laden with gold, silver, silk and sables. But Ali-ad-Din murdered the ambassador and the merchants and confiscated the gifts. When still another ambassador arrived at Samarkand to protest, the Shah, himself, burned the beards and hair of the escorts and sent the ambassador's head back to Karakorum. Then with 400,000 Turks and Persian auxiliaries, as well as thousands more armed slaves, Muhammad Shah sat back and awaited the arrival of the supposedly small, inferior Mongol army.

But the fate of Khwarizm had been sealed and the first attack occurred at the city of the original emissary massacre where Genghis Khan's two sons, Ogedei and Chagati, destroyed the city and killed everyone but the guilty governor, who was taken back to the Great Khan's headquarters where molten metal was poured into his eyes and ears until he died. A second Mongol force, led by Jebe Noyon

Jebe had originally been an enemy of the Great Khan but now was a loyal supporter
went south with 20,000 men into Khurasan below the Amu Darya, to draw off any major force there, while Jochi (also Juchi), another son of the Great Khan, rode west destroying major fortifications. Genghis, himself, with Subedei Bahadur of the Reindeer people turned north and then came in from the flank at the Aral Sea while Jochi came up from the south in a flanking maneuver. After some very rough battles, the Khwarizmian army was annihilated and Genghis appeared at the gates of Bakhara, 400 miles behind the main battle lines. Samarkand fell shortly thereafter and only the Shah escaped, fleeing westward to the Caspian Sea. Jebe, Subedei and Toguchar followed him at the rate of 80 miles a day, accepting the surrender of various cities on the way. The Shah mercifully died of pneumonia before they caught him, so the Mongol task force then spent the winter on the edge of Azerbaijan. The city of Tabriz saved itself by the payment of an enormous amount of silver and thousands of horses. Subedei was summoned home and he covered the 1,200 miles back to Karakorum in seven days. It was on that occasion that the Great Khan instructed Subedei to take Jebe and make a reconnaissance through the western steppes of Asia and Russia during the next two years. (Ref. 27 ) At about this same time, other Mongol armies were completing the annexation of the Kara Khitae Khanate in Manchuria and were starting to conquer China. (Ref. 137 )

Questions & Answers

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Assimilatory nitrate reduction is a process that occurs in some microorganisms, such as bacteria and archaea, in which nitrate (NO3-) is reduced to nitrite (NO2-), and then further reduced to ammonia (NH3).
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Prevent foreign microbes to the host
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They are friends to host only when Host immune system is strong and become enemies when the host immune system is weakened . very bad relationship!
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Source:  OpenStax, A comprehensive outline of world history. OpenStax CNX. Nov 30, 2009 Download for free at http://cnx.org/content/col10595/1.3
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