Conversation so far:
What was significant during the Pre-19th century for the Oromo people?
Oromos also had a number of independent kingdoms, which they shared with the Sidama people.
What type of government did Oromo people in the Pre-19th century have?
Historically, Afaan Oromo-speaking people used their own Gadaa system of governance.
What were some of Oromo people's other independent kingdoms which they shared with the Sidama people?
Some Oromo kingdoms include the Gibe region kingdoms of Kaffa, Gera, Gomma, Garo, Gumma, Jimma, Leeqa-Nekemte and Limmu-Ennarea.
Are there any other interesting aspects about this Oromo people article besides the Gibe region kingdoms of Kaffa, Gera, Gomma, Garo, Gumma, Jimma, Leeqa-Nekemte and Limmu-Ennarea?
Both peaceful integration and violent competition between Oromo people and other neighboring ethnicities such as the Amhara, Sidama, Afar and the Somali affected politics within the Oromo community

Question: Were they violent people?
Self-contained rewrite: Were the Oromo violent people?