The first restructuring of the Nigerian Federation took place with the

The first restructuring of the Nigerian Federation took place with the creation of the Mid-West Region in 1963. This was a significant moment in Nigeria's political history, as it marked the first time that the country was divided into regions based on cultural and ethnic identities. The creation of the Mid-West Region was seen as a response to the demands of the people of the region, who felt that their interests were not being adequately represented in the federal government. While the other options listed may also be important events in Nigeria's political history, they do not represent the first restructuring of the Nigerian Federation.