Tank crew (Still working on it.)

They are members of the most recently formed motorized national guard, or motorized cavalry, and they pilot light vehicles and combat vehicles, and sometimes operate light howitzers.
They have reasonable training, considering that the cavalry corps was something recent for that time, so recent that even the commanders did not know how to use such an organization.

The military uses ear protectors, but lacks an advanced communication system like radio. Besides commanders or soldiers in that role, using a barrette to distinguish them is also important, after all, Their clothing is the same as that of the ordinary crew members.

(Since I’m still working on it, I might change a few things.)