Civil war

A civil war is a conflict where all sides are of the same nationality.
*The Insurrection was a civil conflict in which Insurrectionist factions, primarily the United Rebel Front, began using terrorism to gain independence from the Unified Earth Government.
*The Unggoy Rebellion was a brief conflict in which its Unggoy populace rebelled against unfair treatment.
*The Sixteenth Unggoy Disobedience was an Unggoy attempt to secede from the Covenant Empire.
*The Struggle for Ideological Purity was a civil war among the Covenant Empire. This time, the fighting was over the restoration of religion and the Covenant Ideology, and those who were enemies of it.
*The Great Schism was the final civil war the Covenant would face, which started when the Prophet of Truth ordered the genocide of the Sangheili.