scutage
(scutage from Latin scutum, "shield"), in feudal law, payment made by a knight to commute the military service that he owed his lord. A lord might accept from his vassal a sum of money (or something else of value, often a horse) in lieu of service on some expedition. The system was advantageous to both sides and grew rapidly with the expansion of money economy in Europe in the 12th and 13th centuries.
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