Ordu refers to a military encampment or horde, primarily associated with the Mongol Empire during its expansion under Chinggis Khan. The term signifies not just a physical location where troops gathered, but also embodies the organizational structure of the Mongol military, emphasizing mobility, discipline, and the ability to swiftly respond to threats. This concept was central to the effectiveness of the Mongol forces as they conquered vast territories and established a formidable empire.