War

War is any large-scale, violent conflict. By extension, the word can be used for any struggle. A group of combatants and their support is called an army on land, a navy at sea or in space, and air force in the air. Wars may be prosecuted simultaneously in one or more different theaters. Within each theater, there may be one or more consecutive military campaigns. A military campaign includes not only fighting but also intelligence, troop movements, supplies, propaganda, and other components. Continuous conflict is traditionally called a battle, although this terminology is not always applied to conflicts involving aircraft, missiles or bombs alone, in the absence of ground troops or naval forces.

List of wars

 * Forerunner-Precursor war (c. 10,000,000 BCE)
 * Human-Flood war (c. 110,000 BCE)
 * Human-Forerunner War (c. 110,000 BCE)
 * Forerunner-Flood war (c. 100,300 BCE - 100,000 BCE)
 * San 'Shyuum Schism (2200 BCE - 2100 BCE)
 * Sangheili-San 'Shyuum war (938 BCE - 852 BCE)
 * Taming of the Lekgolo (784 BCE)
 * World War II (1939 - 1945)
 * Jovian Moons Campaign (2160)
 * Rain Forest Wars (2162)
 * Argyre Planitia Campaign (2163)
 * Interplanetary War (2164 - 2170)
 * Inner Colony Wars (?)
 * Unggoy Rebellion (2462)
 * Insurrection (2494 - )
 * Human-Covenant War (2525 - 2553)
 * Great Schism (2552 - )
 * Sangheili civil war (2553 - )
 * Reclamation conflict (c. 2553 - )