I would not because it seems dry down there
Answer: Islam
Explanation:
The old Kingdom of Ghana and the Malian and Songhai empires were all located around the same area at different points in time, the Western part of Africa including Mali and the rest of the Western Sahel.
These Empires became very wealthy from the trade of gold and spice such as salt with Arabian traders and this led to alot of interactions with the latter.
As the Arabs settled and traded with these Empires, they spread the message of The Prophet and Islam spread. Indeed, it was because of the foothold that Islam gained in this kingdom that enabled it to then spread to the rest of Africa.
Immigration to the north provided workers for production and replacements for soldiers killed or wounded.
The allied countries known as the big three the united kingdom, the soviet union and the united states of america. these are the 3 leading countries that controlled the allied tactics during the war against the germany. then these nations leads to the formation of the united nation