The Igala–Benin War was declared when the previous Oba of Benin converted to Christianity to trade with Portuguese, some of Benin nobles did not accept that and betrayed the Oba for the Ata of Igala.

Firstly, the war took a dramatic turn when the servant of Queen Idia managed to assassinate the Igala general,[2] disrupting their command structure and weakening their forces.

Secondly, under the reign of Oba Esigie, the Benin Kingdom benefited from Portuguese firepower and military assistance, giving them a significant advantage in terms of weaponry and tactics.

[2] These combined factors played a crucial role in Benin's victory and the relatively easier path to success during this historical conflict.

This 'minor' war played a significant role in the Afro-Portuguese relations in the 16th century.