What are two reasons Benin's history of slavery was misrepresented in the past?

Benin - A history of region which hold great information about the rich culture of an ancient cultures, as it was made target by the unfortunate act of slave trade. But, in the past the Benin's history of slavery is misrepresented by various historians.

Due, two main reasons;

The west was all involved in the slave trade which occurred in the region, they did not wanted to highlight them just for the sake not to make them look bad. Along with that the analyst were facing difficulties in representing the history with a more clear words due to the forces present inside in Benin outside the region.

Explanation:

In the past an empire in Africa existed, it was rich and considered the most powerful in the region. As its ruler had the man power, along with the riches to defend there country. But, in the time when there came crises and people were made slaves as foreigner were there to purchase slaves from the leaders who are willing to let there people in exchange of gold and other favors from the Portuguese, Brits, and the french.