In echelon trains, which pairs illustrate hub and spoke?

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In echelon trains, distribution uses a hub-and-spoke pattern where a central hub coordinates sustainment and dispatches what is needed to the spokes, which pull resources and execute movement on the ground. The supply platoon serves as the hub because it holds the stock, manages replenishment, and issues supplies to the rest of the train. The transportation platoon is the spoke: it moves those supplies toward the supported units, following the hub’s priorities and orders. This arrangement shows planning and issuing flowing from the hub, while execution—moving materiel to where it’s needed—happens at the spoke. Other pairings place the central coordinating role with units whose primary job is movement or specialized support, which doesn’t align with the hub-and-spoke flow of sustainment.