Before revision: Established in c. the 3rd century, it was centered in what is today Senegal and Mauritania, it was the first to benefit from the introduction of pack animals by Wolof traders .
After revision: Fully maturing in roughly the 1st to 2ndMali,in 3rd century century, it was centered in what is today Senegal and Mauritania, it was the first to benefit from the introduction of pack animals by Wolof traders .