Answer: scutage, also called shield money
Step-by-step explanation:
scutage, also called shield money, French écuage, (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) instead of service on some expedition.