Pierre Terrail, seigneur de Bayard (born c. 1473, Château Bayard, near Pontcharra, France—died April 30, 1524, Italy) was a French soldier known as le chevalier sans peur et sans reproche (“the knight without fear and without reproach”).

Bayard was born into a noble family, nearly every head of which for two centuries past had fallen in battle. He accompanied King Charles VIII of France into Italy in 1494 and was knighted after the Battle of Fornovo (1495). In Louis XII’s wars he was the hero of numerous combats; he was wounded at the assault on Canossa and was the hero of a celebrated combat of 11 French knights against an equal number of Spanish ones. On one occasion he is said to have defended a bridge over the Garigliano single-handed against about 200 Spanish troops, an exploit that brought him such renown that Pope Julius II sought unsuccessfully to entice him into the papal service. In 1508 he distinguished himself again at the siege of Genoa and, later, at the siege of Padua. Severely wounded at Brescia, he nevertheless hurried to join the Battle of Ravenna (1512).

On the accession of Francis I in 1515, Bayard was made lieutenant general of Dauphiné. When war broke out again between Francis I and the Holy Roman emperor Charles V, Bayard, with 1,000 men, held Mézières against an army of 35,000, and after six weeks he compelled the imperial generals to raise the siege. This stubborn resistance saved central France from invasion and gave Francis time to collect the army that drove out the invaders (1521). In 1523 Bayard was sent to Italy with Guillaume de Bonnivet. The latter, who was defeated at Robecco and wounded during his retreat, implored Bayard to assume command. Guarding the rear at the passage of the Sesia, Bayard was mortally wounded by a harquebus ball. He died in the midst of the enemy. His body was restored to his friends and interred at Grenoble.

Bayard was one of the most skillful and professional commanders of the 16th century in Europe. He obtained complete information about the enemy’s position and plans by reconnaissance and espionage, and in the midst of mercenary armies he remained absolutely disinterested in plunder. To his contemporaries he was the faultless knight—heroic, devout, generous, and kindly.