In the city of Zazzau (Zaria) was built well-fortified walls to protect the ancient city by Queen Amina of Zaria, who is renowned for her wise military exploits and strategies so many years. This wall still stands majestically in the modern city of Zaria.
Amina's mother, Bakwa of Turunka, was ruler of Zazzua. Amina was trained in skills of government and military warfare, and fought in battles with her brother, Karama.
In 1566, when Bakwa died, Karama became king. In 1576 when Karama died, Amina, now about 43, became Queen of Zazzua. She used her military prowess to expand the territory of Zazzua to the mouth of the Niger in the south and including Kano and Katsina in the north. These military conquests led to great wealth, both because they opened more trading routes, and because conquered territories had to pay tribute.
Mud walls around cities became known as "Amina's walls" because Amina is said to have build such walls around her military camps.