The first great western african kingdom is ?

The founder and first ruler of the Kingdom of Mali was Sundiata Keita. We know about him through the writings of a 14th century North African historian named Ibn Khaldun. Sundiata expanded the kingdom to include the Kingdom of Ghana and West African gold fields. The most celebrated king of Mali was Mansa Musa.

Explanation:

don't know but i know the moderators know how to. : (

the great wall of china worked as a defense for the feudal states of the zhou dynasty to the north. during the warring states period more walls were put up to defend the borders of the different kingdoms. it was semi successful because despite the wall, the mongols eventually conquered china also the great wall provided protection to the economic development and cultural progress, safeguarded the trading routes such as the silk road, and secured transmission of information and transportation. @jayxboof