After Mali declined in the 1400's. the people from the east created Songhai. One of the great rulers was named Sunni Ali.
I am on of the kings of Songhai. I built the vast empire by military conquest and was an efficient leader.
Sunni Ali governed effectively by creating a professional army with a riverboat fleet, being a skilled military commander, and his aggressive leadership.
Unfortunately Sunni Ali died in 1492, and his son became the next ruler.
This is the other successful ruler named, Askia Muhammad. He was Sunni Ali's son.
I was very successful in my empire, I take after my father. Until 1591 when it went down hill from there.
The Chinese had invented gunpowder and then the Arabs created the first gun. So a Moroccan fighting force with tons of men and guns came to invade us, all the Songhai army had was swords and spears. After that the empire lost its power, and was never restored.