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Ration
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"Rationing".
Supplies were limited. In order to fairly distribute the items in short supply, rationing was introduced. That prevented the rich from being able to corner the market on goods. It help make sure that the troops had the things that they needed to fight.
Goods may be rationed during wartime for a couple of reasons. When commodities become scarce (which can happen during wartime) and demand remains the same prices will rise, maybe a lot. Rationing reduces the demand and thus keeps prices from going out of reach for ordinary income people. Some commodities such as tires, gasoline, etc. are needed for the war effort, rationing makes them available for this purpose. I don't remember services being rationed but if they were it would be for the same reasons.