The Oromo governed themselves in accordance with the Gadaa system long before the 16th century, when major three party wars commenced between them and the Christian kingdom to their north and Islamic sultanates to their east and south. The result is that Oromo absorbs of the Christian and Islam religions. The Borana and Guji groups near the Ethiopian-Kenyan border able to practice Gadaa without interruption. State of Oromia under the Federal system of in Ethiopia, the Gadaa system across Oromia started renaissance. In 2015, the Gadaa Center at Odaa Bultum was inaugurated and in 2018, the Gadaa Center at Odaa Hullee reinstalled after two centuries of interruption. In 2019, Bule Hora University launched a master's degree program in Gadaa studies.