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How did heavily armoured knights shape warfare and politics in the Middle Ages?

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feudalism Detail from the *Heidelberger Sachsenspiegel* showing the homage ceremony, in which the vassals put themselves under the protection of their lords by placing their hands between his hands, 14th century; in the Universitatsbibliothek, Heidelberg, Germany.

Heavily armoured knights were the central military and political force of the Middle Ages, shaping society through their dominance as shock cavalry and their role as a landed military aristocracy.123

Impact on Warfare

Knights revolutionized medieval combat through the use of the couched lance and heavy armour, which allowed them to act as a powerful, singular unit during a charge. Their tactical superiority on open terrain made them the primary means of stopping opposing cavalry for several centuries. However, this dominance was fragile; it relied on maintaining cohesion, as knights were often prone to undisciplined, individualistic fighting styles. Their effectiveness waned when faced with organized infantry or specialized tactics, such as those used by Eastern horse archers, and they eventually lost their ascendancy as infantry capabilities improved in the 14th century.12

Impact on Politics

Politically, knights formed the core of a military aristocracy that controlled land and resources. Because kings lacked the tax machinery to fund standing armies, they relied on these autonomous warriors, who held land in exchange for military service. This created a decentralized power structure where local lords, operating from fortified castles, often wielded more practical authority than the monarchs themselves.342