Answer:
by growing up i guess, or you could keep up with CNN or other political news channels.
Explanation:
<span>the leader that known as "ruler of all men," united the Mongol tribes and brutally conquered much of Muslim Asia was: D. Genghis Khan
Gengis Khan managed to united various Mongolian tribes that previously fight against each other, unite them, and lead them as a large viscious barbarian army.
During his reign, He managed to conquest allmost all parts of Asian continent and some parts of Eastern European Region</span>
