
Constable of France, then Imperial Commander
"I have no country now. I have an army, and it must be paid."
The greatest magnate in France and its Constable — the supreme military office — Bourbon fought brilliantly for Francis I at Marignano and was then systematically ruined by him. Francis's mother Louise of Savoy laid claim to his inheritance, the courts obliged the crown, and Bourbon lost his lands to a legal manoeuvre. In 1523 he defected to Charles V and became the most infamous traitor in French history. He commanded Imperial forces at Pavia, where the king who had ruined him was captured. Then he was handed the thing that destroyed him: an army in Italy that Charles V could not pay. Unpaid German landsknechts and Spanish veterans do not disband, they mutiny, and by 1527 Bourbon was less their commander than their hostage — they marched on Rome to pay themselves and he went with them because he could not stop them. He was shot dead scaling the walls on the first morning, reportedly by Benvenuto Cellini, who claimed the credit in his memoirs. It was the worst possible outcome: the army took Rome with nobody in command at all, and destroyed it for eight days. Bourbon is the age in one man — a feudal lord ruined by lawyers, who died leading mercenaries he could not control against a city nobody had ordered him to attack.
Did you know?
Benvenuto Cellini claimed in his memoirs to have personally shot him off the walls of Rome. Bourbon’s death left the army leaderless, which is precisely why the sack was so total — there was no one left with the authority to stop it.
September 13–14, 1515 · 16,000 total casualties
The battle that broke the myth of Swiss invincibility and made Francis's reputation. The pike square, unsupported, could not survive massed guns. The Swiss drew the correct conclusion, signed the Perpetual Peace with France in 1516, and never again fought as an independent great power — the origin of Swiss neutrality is a defeat in Lombardy. Francis had himself knighted on the field by Bayard.
February 24, 1525 · 14,000 total casualties
The decisive battle of the Italian Wars and the day the armoured knight died as a battlefield arm. Loose arquebusiers using terrain destroyed the finest heavy cavalry in Europe and took a king prisoner. Francis wrote to his mother that all was lost save honour, was carried off to Madrid, and signed away Burgundy to get out — then repudiated it the moment he was free. Charles V had won Italy and gained an enemy for life.
May 6, 1527 · 12,000 total casualties
The end of the Renaissance in Rome, and the emperor's own army did it without his orders. Perhaps 12,000 died; the population fell from 55,000 to 10,000; churches were stripped, libraries burned, cardinals ransomed. Many of the Lutheran landsknechts believed they were punishing the Whore of Babylon. Clement VII, trapped in Castel Sant'Angelo, later refused Henry VIII's annulment while under Habsburg control — so the English Reformation is downstream of an unpaid army in Rome.
February 17, 1490
🌅 Birth
Born heir to the greatest fief in France
September 14, 1515
⚔️ Battle
Fights brilliantly for Francis I at Marignano
September 8, 1523
📍 Posting
Stripped of his lands by the crown; defects to Charles V
February 24, 1525
⚔️ Battle
Commands at Pavia as his old king is captured
May 6, 1527
✝️ Death
Shot dead on the walls of Rome, leaving the army leaderless