They Had Rich, Black Soil that lined the Nile, and they were able to grow an array of crops, Which were quite Successful and Ideal for necessary crops.
Based on documentation,
The only 2 African countries that were able to keep their freedom from European imperialism were;
B: Ethiopia and Liberia.
Ethiopia is currently the worlds oldest independent country and Liberia was founded to support the U.S. in relation to slavery in 1821.
I hope this has aided you and is sufficient.
Cheers! <span />
Gassed then burned. Why would you gas them if they are burnt to death already?