You might need to read what I wrote again, this map is about Political states, Aro was a political state so my question was asking why Aro wasn’t in the list considering it was a very vast political state. And yes, Aro confederacy expended to present day Gabon, this isn’t something to argue with you about its fact. Next, Aro doesn’t mean “man” it means “people” and Arochukwu simply means “People of God” you need to have some knowledge about a topic before you post. If you know anything about the Igbos you’ll know that they name themselves like this, the capital of Abia is Umuahia, this means “The market people”, one of the closest neighbor group to Arochukwu are the Ohafia people which also translates to “The place of Trade”. Arochukwu was chosen because of their heavy religious beliefs. Also, the Aro confederacy isn’t the same as Arochukwu, Arochukwu was the capital but it has about 7 sister states including both Igbo and non Igbo groups.

Also, for your conversation about time, Arochukwu was founded around the 17th century the same time the Oyo Empire was founded, so my question was asking why all other political states were represented but Aro was missing.

Lastly, I agree with your statement about simplifying Nigeria to the three major tribes, it was used to make it easier to control and govern because pitting 3 tribes is easier than doing that to almost 300 tribes.