The War of Vengeance is a term used by historians to refer to the period of almost continuous conflict lasting from 2555 to 2562 between the Covenant Remnant Factions, and the alliance of the United Nations Space Command and the Sangheili Armed Forces. The war lasted seven years and cost the lives of approximately 160 million beings, but due to the relative technological parity between the two sides, the war was considerably less costly in terms of life than the First Great War, also known as the Human-Covenant War.