In what year was the peace treaty signed in Yorubaland?

Explanation

IN the thousands of years of the pre-20th Century history of the Yoruba nation, the Yoruba Peace Treaty of September 23 1886 is a unique document of incalculable importance. In modern Yoruba history, it is a foremost document that was deliberately designed to foster unity and peace among all parts of Yoruba land and among the entire Yoruba nation, Black Africa's largest nation and Black Africa's foremost leader in civilization.