From Halopedia, the Halo wiki
Choppers became popular among the Banished that it became a competition to become a driver in outrider squadrons.
Halo Wars 2
In Halo Wars 2 Choppers can be built by all Banished leaders besides Let 'Volir and Ripa 'Moramee at the Banished outpost. As a scout unit Choppers can gather resources. Choppers do well against infantry, okay against vehicles, and poorly against aircraft and structures.
List of appearances