Every captain in an early modern army held enormous power over the rank and file of his company. In absolute charge of discipline he could flog, fine, or otherwise humiliate his men whenever he chose; because he alone decided who should perform sentry guard and other onerous duties, the captain was free to victimize the men he disliked and excuse his friends…. [Without] interference from above, [a Spanish Empire] captain chose the two sergeants and eight corporals of his company (the cabos de escuadra or corporals were in charge of twenty-five men and received a wage-bonus of 3 escudos each per month), and he distributed at his pleasure 30 escudos of treasury bonus-pay among his men. As if this were not enough, the insolvency of the military treasury made the company captains into money-lenders and welfare-officers as well. Every company had a chest (caja) kept by the captain and used by him to advance subsistence wages (the socorro) to necessitous men when no money arrived from the treasury. The captains were also responsible for ransoming, re-arming, or re-horsing any of their men who had the misfortune to lose their liberty, their weapons, or their mounts. Naturally when the treasury did contrive to pay an [installment] of wages the captains expected to receive it first in order to deduct the sums already advanced “on account”. The scheme was excellent in principle, but it assumed that all captains were honest and scrupulous men. Of course they were not…. “The arrangements for paying the troops played right into the eager hands of the captains, who took full advantage of the generous opportunities afforded them.”
Jean [de Carrouges]…held the rank of squire. Rather than the “gallant youth” this term often brings to mind, he was a battle-hardened veteran already in his forties, one of those “mature men of a rather heavy type—knights in all but name.”
By 1380 [C.E.], Jean…commanded his own troop of squires, numbering from four to as many as nine, in the campaigns to rid Normandy of the English. In war he sought to burnish his name and enrich himself by seizing booty and capturing prisoners to hold for ransom, a lucrative business in the fourteenth century. He may also have sought a knighthood, which would have doubled his pay on campaign…. [A] knight’s daily pay on campaign was one livre, while a squire received half that.
— The Last Duel, Chapter 1
A squire would not be knighted if he could not afford to maintain that higher station. Thus the drive for booty and ransom.