People started taking sides and having disagreements
<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>
Only era can vary in length of time.Era means age,period which doesn't exactly define the time
Century=100 years
decade=10 years
millennium = 1000 years,
Answer: That he can control land and sea?
Explanation: