How do we know so much about the Mali Empire's history?

Much of the recorded information about the Mali Empire comes from 14th-century North African Arab historian Ibn Khaldun, 14th-century Moroccan traveller Ibn Battuta and 16th-century Moroccan traveller Leo Africanus. The other major source of information is Mandinka oral tradition, through storytellers known as griots.

Explanation:

try to paraphrase it

in 32-page handwritten address, washington urged americans to avoid excessive political party spirit and geographical distinctions, in foreign affairs he warned against long-term alliances with other nations. the address was printed in philladelphia's american daily advertiser on september 19, 1796