Sunni Ali, one of the most effective military strategists to have ever lived, continuously expanded the Songhai Empire. At its height, the Songhai Empire covered what is now modern-day Gambia, Senegal, Niger, and Northern-Nigeria. Because of the wide territory it covered, the Songhai Empire is often referred to as the largest and wealthiest empire to have emerged in West-Africa.
The Sunni dynasty was later replaced by the Askia dynasty founded by Askia Muhammed the first, who later became known as Askia Muhammed the Great. Askia continued the expansion of the Songhai Empire in all directions within West-Africa and officially converted the Songhai Empire into an Islamic state.