A federalism system of government is a government in which there is division of powers between the Central Government and the governments of the component units and each level of government is independent within its own sphere.

J.T.U. Aguiyi Ironsi Military Rule (January, 1966 – July, 1966) - The deep division in the political class and the military institution itself, encouraged a few young army officers to overthrow the civilian government of Alhaji Tafawa Balewa at the dawn of 15th January, 1966.