Songhai
The Songhai empire is the last of the three major west African medieval empires the first Songhay king, Sonni Ali Ber established the boundaries of the songhai state creating roots for a growing empire. His successor Askia Mohammed Touré created an empire by conquering much of west Africa, his sons however were corrupt and weakened the empire after there rule the Northern Territory was controlled by morocco and the southern eventually splintered into independent territory's until the 1600's when the European colonization period began.