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In page Knight:

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Armies of the time started adopting a more realistic approach to warfare than the honor-bound code of chivalry. Soon, the remaining knights were absorbed into professional armies. Although they had a higher rank than most soldiers because of their valuable lineage, they lost their distinctive identity that previously set them apart from common soldiers.[1] As the age of knights dissolved, some still survived as knightly orders who still exist even by the end of the Medieval Age. They adopted newer technology while still retaining their age-old chivalric traditions. Examples of holy orders that existed beyond the Middle Ages were the Knights Hospitaller and Teutonic Knights.[4]