How did Mongol herders also serve as soldiers?

In the history of Mongolia, the roles of herdsman and soldier were deeply intertwined, as every man who could ride and bear arms functioned as both according to the immediate needs of his clan or leader.12

This dual role was rooted in the nomadic pastoralist lifestyle, which provided inherent military advantages, such as high mobility and the ability to sustain a cavalry force. Because their economy was specialized toward the production of horses and livestock, these groups often relied on raiding to accumulate property, capture prisoners, or secure resources they could not produce themselves.3412

By the time of Genghis Khan in the 13th century, this informal tradition was formalized into a highly organized decimal military structure (units of 10, 100, 1,000, and 10,000). Under this system, commanders were assigned specific territories from which they drew tribute and mustered their required quotas of troops. Consequently, when not engaged in large-scale military campaigns, these men continued their lives as pastoralists, maintaining the herds that were essential to both their economic survival and their military readiness.12354