The term evokes knighthood and feudalism, useful for understanding historical class systems. A squire was bound in loyalty to his knight.
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Chivalric Training
Becoming a squire was a step towards knighthood, involving training in combat and courtly manners. He dreamed of the day he'd go from squire to knight.
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Not Just Servants
Squires weren't ordinary servants; they held a respected position with social prestige. The squire attended the king's banquet alongside his knight.