Huambo Railway Station is part of the Benguela Railway story, the line built to connect Lobito on the Atlantic with the copper country far inland. Huambo's growth, status, and old strategic value are hard to understand without that railway.
Passenger service and schedules can be unreliable, so treat the station as heritage and practical infrastructure rather than a guaranteed travel solution. It is still one of the better ways to grasp why this highland city mattered.