Guardian (Halo)

Guardians are a Forerunner constructed "species" of artificial intelligence that are designed for the sole purpose of policing rebellious or hostile worlds prior to the extinction of the Forerunner race at the end of the Forerunner-Flood War.

History
Similar to other Forerunner created artificial intelligence units, the Guardians were first put into service during the age of the ancient Forerunner empire, the Ecumene, prior to its destruction at the end of the Forerunner-Flood War. After the collapse of the Ecumene, the Guardians were sent into hiding across the galaxy on various planets, namely planets that carried varying degrees of life. Thousands of years after this, the Guardians were reawakened by the rogue human artificial intelligence unit, Cortana, after she had been "cured" of her rampancy. Under Cortana's control, the Guardians became full-fledged members of her A.I. based military force known as The Created and were planned to be used to force an Imperial justice known as the Reclamation upon hostile planets that refused to join Cortana's cause.

Appearances

 * Halo 5: Guardians (first appearance)