Shortly before the Brute cruiser Rapid Conversion made contact with humanity on the planet Harvest, an accident damaged one of the Spirit dropships onboard. A Covenant Huragok, Lighter Than Some, seized this opportunity to atone for a past misdeed he committed against the humans. Since the planet was agrarian, the creature used parts from the Spirit to create a pair of farming vehicles – akin to Harvest’s JOTUN tractors – as a gift for the humans. However, believing these to be combat vehicles, the Brutes affixed weapons to the machines and deployed them against the very same humans for whom the vehicles were intended. After Harvest, the Brutes integrated several features more reasonable for a rapid assault vehicle, including twin pairs heavy spike cannons for ranged combat.
Throughout the war with humanity, the Brutes continued to intermittently manufacture Choppers until 2552, when the bulk of the vehicle’s production were moved to High Charity’s Sacred Promissory in the leadup to the Brute’s coup d'état against the Covenant’s military leaders, the Elites. These secret forges produced massive numbers of these crude machines until High Charity’s destruction following the Great Schism. The resulting loss of the Sacred Promissory did not end the Chopper’s production, however, as scattered worlds under the thumb of Brute warlords continue to assemble these vehicles for independent raiding packs and Banished warhosts alike, ensuring that they will continue to be an unwelcome sight on human worlds for many years to come.