5. Battle of Agincourt (1415)
At Agincourt, Henry V’s outnumbered English army relied on the deadly longbow to shatter waves of French knights. This victory signaled the decline of heavy cavalry’s dominance and ushered in the era of ranged infantry. Agincourt’s lessons in terrain, discipline, and firepower reverberated through medieval and Renaissance tactics. The image of muddy fields and falling arrows remains a powerful symbol of tactical innovation.
