Final answer:
In 1206, the Mongol tribes were unified under Genghis Khan during a kuriltai, marking the beginning of the Mongol Empire.
Step-by-step explanation:
What happened in 1206?
In the year 1206, a significant event in Mongolian history took place: the unification of the Mongol tribes under a single leader, Genghis Khan. During a kuriltai, which is a political and military council gathering, Temujin was proclaimed 'Chinggis Khan', which means 'Universal Ruler'. This event marked the beginning of the Mongol Empire, which would eventually become the largest contiguous empire in history. The unification under Genghis Khan led to a series of military campaigns that greatly expanded Mongol influence across Asia and into Europe.
Although not directly related to the question, it's worth noting that the year 1206 was also within the period of increased conflicts between the Taira and Minamoto clans in Japan, which had notable impacts on Japanese history, including the eventual establishment of the Kamakura shogunate under Minamoto no Yoritomo.