Biography

Bertrand du Guesclin (c. 1320-1380) was a Breton knight who became Constable of France under Charles V. A skilled strategist of the Hundred Years' War, he reconquered much of French territory from the English through guerrilla warfare and harassment tactics.

Bertrand du Guesclin(1320 — 1380)

Bertrand du Guesclin

France

5 min read

MilitaryPoliticsMiddle AgesLate Middle Ages, first phase of the Hundred Years' War, reign of Charles V (14th century)

Frequently asked questions

Bertrand du Guesclin (around 1320-1380) was a Breton knight who became Constable of France under Charles V. The key thing to remember is that he completely changed French military strategy during the Hundred Years' War. Unlike the great pitched battles that had caused disasters at Crécy and Poitiers, he favored guerrilla warfare and harassment, gradually winning back from the English most of the lost territories. What sets him apart from other war leaders of his time is his ability to turn undisciplined bands into an effective army, using ambushes and methodical sieges rather than direct confrontations.

Key Facts

  • Born around 1320 at La Motte-Broons, in Brittany, into the minor nobility
  • Distinguished himself during the defense of Rennes (1356-1357) against the English
  • Appointed Constable of France by Charles V in 1370, the highest military office in the kingdom
  • Led the reconquest of English-held territories through harassment tactics rather than pitched battle
  • Died in 1380 during the siege of Châteauneuf-de-Randon; buried at Saint-Denis among the kings

Works & Achievements

Defense of Rennes (1356-1357)

Organization of the victorious resistance against the English siege, which reveals his talent for harassment warfare.

Victory at Cocherel (1364)

Defeat of the troops of Charles the Bad, which consolidates the authority of the new king Charles V.

Castile Expedition (1366-1369)

Leading the Great Companies into Spain to place Henry of Trastámara on the throne, removing these mercenary bands from the kingdom of France.

Appointment as Constable of France (1370)

Rise to the highest military office in the kingdom, commander-in-chief of the royal armies.

Reconquest of the West and Poitou (1370-1374)

Methodical campaigns reclaiming from the English most of the territories ceded under the Treaty of Brétigny.

Brittany Campaign (1373)

A great mounted raid that brings the duchy back into the orbit of the king of France against English ambitions.

Anecdotes

Born into a minor Breton noble family near Dinan, Bertrand du Guesclin was said to have been so ugly as a child that his own parents largely neglected him. He preferred brawls and improvised tournaments to lessons, and according to legend he took part in a tournament in Rennes around the age of sixteen, unhorsing several opponents before his identity was discovered.

In 1357, during the English siege of Rennes, du Guesclin organized the city's defense through raids and harassing night sorties. This strategy of attrition — rather than pitched battles — became his trademark throughout his career.

In 1364, at the Battle of Cocherel, du Guesclin won a decisive victory over the forces of Charles the Bad, King of Navarre. The triumph consolidated the power of the newly crowned King Charles V and earned the Breton knight a meteoric rise.

Captured several times by the English, du Guesclin had to be ransomed each time. Legend has it that at Nájera in 1367, taken prisoner by the Black Prince, he set his own ransom at an extraordinarily high sum to prove his worth, daring his captor not to let him go.

Du Guesclin died in 1380 during the siege of Châteauneuf-de-Randon, in the Lozère. Tradition holds that the English captain holding the fortress, having promised to surrender, came to lay the keys on the coffin of the dead constable. Charles V honored him with burial at Saint-Denis, among the kings of France.

Primary Sources

The Song of Bertrand du Guesclin, by Cuvelier (around 1385)
A verse narrative by the trouvère Cuvelier celebrating the exploits of the Constable, portrayed as the “tenth Worthy,” the equal of the great heroes of chivalry.
Chronicles of Jean Froissart (late 14th century)
Froissart describes du Guesclin as a shrewd captain who waged war through ambushes and harassment rather than great pitched battles, reconquering town after town from the English.
Grandes Chroniques de France (14th century)
The official chronicle of the reign of Charles V, mentioning du Guesclin's appointment as Constable of France and his campaigns of reconquest.

Key Places

Château de la Motte-Broons (near Broons)

Presumed birthplace region of Bertrand du Guesclin, in Brittany, around 1320. Cradle of his family of minor nobility.

Rennes

Capital of Brittany where du Guesclin distinguished himself during the siege of 1356-1357 by harassing the besieging English forces.

Cocherel

Site of the 1364 victory against the Navarrese troops, which launched du Guesclin's career in the service of Charles V.

Nájera (Spain)

Battlefield of 1367 where du Guesclin, fighting in Castile, was captured by the Black Prince of England.

Châteauneuf-de-Randon (Lozère)

Stronghold of the Gévaudan whose siege du Guesclin was leading when he died in July 1380.

Basilica of Saint-Denis

Necropolis of the kings of France where Charles V had his constable buried, an exceptional honor for a man of minor nobility.

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See also