Nigeria's Miltary ranked is 4th most powerful in Africa

According to an index just released by the Global Firepower (GFP), a platform that measures a government’s military, Egypt has the most powerful military in Africa, followed by Algeria, Ethiopia, Nigeria and South Africa. Out of 30 African countries the GFP has been able to determine that Egypt as the leading country in Africa in military power and 12^th out of 126 countries in the world. Egypt has the manpower, equipment which covers the air, land, naval power and the petroleum to sustain its army among other factors. Following closely is Algeria, Ethiopia, Nigeria and South Africa. The rest are:

Angola

Morocco

Sudan

Libya

Democratic Republic of the Congo

Kenya

Tunisia

Zimbabwe

Zambia

Chad

Uganda

Tanzania

South Sudan

Ghana

Cameroon

Mozambique

Niger

Ivory Coast

Mali

Madagascar

Gabon

Republic of the Congo

Namibia

Somalia

Central African Republic

The annual GFP index boasts of using an algorithm that attempts to provide a fair canvas that presents an unbiased ranking and realistic outlook on the conventional military firepower and strength of countries. Their system focuses on the diversity of weapons systems and provides bonuses and penalties for things like nuclear arms, diversity of force structures, and alliances (like NATO). The formula is interesting because it makes a smaller but more technologically advanced country competitive with larger militaries from less advanced countries. 

CCTV