<Li> 209 BC: Kingdom of Nan Yueh is established by Tch'ao T'o (Trieu Dynasty) </Li> <Li> 208 BC: The Xiongnu replaces the Mongolic Donghu as the dominant tribe of the Mongolian steppe and then five years later defeats the Yuezhi in Gansu, making a cup out of the skull of their leader . </Li> <Li> c. 206 BC: Liu Bang is proclaimed emperor and the Han Dynasty is established . </Li> <Li> 202 BC: Scipio Africanus defeats Hannibal at Battle of Zama Eastern Hemisphere in 200 BC . </Li>

When did the mayan classic age occur and what defines it