They had different religions, beliefs, ideals, lived in different regions, and etc. Their culture as a whole are different even though certain aspects are similar.
It was mainly "a. Genghis Khan" who <span>united and expanded the Mongol Empire, due mostly to his superior military skills, which allowed the Mongols to conquer vast areas of land. </span>
Alexandria was an Egyptian city that played a major role in developing the vast trading network along the Mediterranean sea.