Considerable Logistics of Medieval Knights at War

Going to war with [medieval knights] was a costly affair, in many cases bringing belligerent princes to bankruptcy. A knight would rarely embark for battle without the six horses which he was permitted, or his page apprentice to help him on with his armour. Providing enough food, shelter and material for a large number of these knights and their attendant foot soldiers was…a far more complex and sophisticated job of administration than is generally imagined. The logistics were considerable, involving smiths, armourers, painters, tent-makers, fletchers (arrow-makers), cordeners (leather-workers), bowyers, turners, carpenters, masons, wheelwrights, saddlers, purveyors (of food), quartermasters and farriers. There were also surgeons, chaplains, legal and clerical staff, trumpeters and pipers, and, most important, cooks.

— Connections, p. 57

While not exclusively, the bulk of this logistical challenge is people. Squires, retainers, and hirelings, oh my!