The governing fact was that medieval organization by this time had passed to a predominantly money economy. Armed forces were no longer primarily feudal levies serving under a vassal’s obligation who went home after forty days; they were recruited bodies who served for pay. The added expense of a paid army raised the cost of war beyond the ordinary means of the sovereign. Without losing its appetite for war, the inchoate state had not yet devised a regular method to pay for it. When he overspent, the sovereign resorted to loans from bankers, towns, and businesses which he might not be able to
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