Hundred Years' War: In Rouen, France, the 19-year-old Joan of Arc is burned at the stake by an English-dominated tribunal. The Roman Catholic Church remembers this day as the celebration of Saint Joan of Arc.

Joan of Arc (French: Jeanne d'Arc pronounced [an dak]; c. 1412 30 May 1431) is considered a heroine of France for her role in the siege of Orlans and the coronation of Charles VII of France during the Hundred Years' War against England. After successfully leading several French military actions, she was captured, handed over to English authorities, convicted as a heretic, and burnt at the stake in 1431. Twenty-five years later, her conviction was formally overturned. Nearly 500 years after her death, she was canonized as a saint by the Roman Catholic Church.

Joan was born to a peasant family at Domrmy in northeast France. In 1428, she traveled to Vaucouleurs and requested to be taken to Charles, later testifying that she had received visions from the archangel Michael, Saint Margaret, and Saint Catherine instructing her to support Charles and recover France from English domination. Her request to see the king was rejected twice, but she was finally given an escort to meet Charles at Chinon. After their interview, Charles sent Joan, who was about 17 years old, to the siege of Orlans as part of a relief army. She arrived at the city on 29 April 1429, and quickly gained prominence during the fighting. The siege was lifted nine days after her arrival. Joan participated in the Loire Campaign, which culminated in the decisive defeat of the English at the Battle of Patay. The French army advanced on Reims and entered the city on 16 July. The next day, Charles was crowned as the King of France in Reims Cathedral with Joan at his side. These victories boosted French morale and paved the way for the final French victory in the Hundred Years' War at Castillon in 1453.

After Charles's coronation, Joan and John II, Duke of Alenon's army besieged Paris. An assault on the city was launched on 8 September. It failed, and Joan was wounded. The French army withdrew and was disbanded. In October, Joan was participating in an attack on the territory of Perrinet Gressart, a mercenary who had been in the service of the English and their French allies, the Burgundians. After some initial successes, the campaign ended in a failed attempt to take Gressart's stronghold. At the end of the 1429, Joan and her family were ennobled by Charles.

In early 1430, Joan organized a company of volunteers to relieve Compigne, which had been besieged by the Burgundians. She was captured by Burgundian troops on 23 May and exchanged to the English. She was put on trial by the pro-English bishop, Pierre Cauchon, on a charge of heresy. She was declared guilty and burned at the stake on 30 May 1431, dying at about 19 years of age. In 1456, Pope Callixtus III authorized an inquisitorial court to investigate the original trial. The court nullified the trial's verdict, declaring it was tainted by deceit and procedural errors, and Joan was exonerated. Since her death, Joan has been popularly revered as a martyr. After the French Revolution she became a national symbol of France. She was canonized in 1920, and declared a secondary patron saint of France in 1922. Joan of Arc remains a popular figure in modern literature, painting, sculpture and music, and cultural depictions of her continue to be created.

The Hundred Years' War (French: La guerre de Cent Ans; Picard: Dgère d'Un Chint Ans; 1337–1453) was a series of armed conflicts between the kingdoms of England and France during the Late Middle Ages. It originated from disputed claims to the French throne between the English royal House of Plantagenet and the French royal House of Valois. Over time, the war grew into a broader power struggle involving factions from across Western Europe, fueled by emerging nationalism on both sides.

The Hundred Years' War was one of the most significant conflicts of the Middle Ages. For 116 years, interrupted by several truces, five generations of kings from two rival dynasties fought for the throne of the largest kingdom in Western Europe. The war's effect on European history was lasting. Both sides produced innovations in military technology and tactics, including professional standing armies and artillery, that permanently changed warfare in Europe; chivalry, which had reached its height during the conflict, subsequently declined. Stronger national identities took root in both countries, which became more centralised and gradually rose as global powers.The term "Hundred Years' War" was adopted by later historians as a historiographical periodisation to encompass related conflicts, constructing the longest military conflict in European history. The war is commonly divided into three phases separated by truces: the Edwardian War (1337–1360), the Caroline War (1369–1389), and the Lancastrian War (1415–1453). Each side drew many allies into the conflict, with English forces initially prevailing; the House of Valois ultimately retained control over France, with the previously-intertwined French and English monarchies thereafter remaining separate.