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In page War hammer:

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Full-fledged warhammers emerged in the mid-14th century as a direct response to the growing prevalence and effectiveness of plate armor on European battlefields.[1] By 1395, French infantry deployed sophisticated warhammers equipped with thrusting tips, side flanges, and a basic beak, known as "Picoise."[citation needed] These initially single-handed warhammers would later evolve into longer two-handed pole hammers, becoming not only widespread on European battlefields but also prominent in duels, particularly those involving armored combatants in tournaments or judicial settings.[citation needed]