Question: Which battle of the Hundred Years' War is the subject of Leslie Barringer's historical novel?

full_context: Document 1: Battle of Ashdown: The Battle of Ashdown, in Berkshire (possibly the part now in Oxfordshire), took place on 8 January 871. Alfred the Great, then a prince of only 22, led the army of his brother, King Ethelred of Wessex, in a victorious battle against the invading Danes.
Document 2: Gerfalcon (novel): Gerfalcon is a fantasy novel by Leslie Barringer, the first book in his three volume Neustrian Cycle. It is set around the fourteenth century in an alternate medieval France called Neustria (historically an early division of the Frankish kingdom). The book was first published in 1927 by Heinemann in the United Kingdom and Doubleday in the United States. Its significance was recognized by its republication in 1973 by Tom Stacey in the UK and in March, 1976 by the Newcastle Publishing Company in the US, as the seventh volume of its celebrated Newcastle Forgotten Fantasy Library series. This Newcastle edition was reprinted twice, once by Newcastle itself in 1977 and once by Borgo Press in 1980.
Document 3: Battle of Ashdown: The Battle of Ashdown, in Berkshire (possibly the part now in Oxfordshire), took place on 8 January 871. Alfred the Great, then a prince of only 22, led the army of his brother, King Ethelred of Wessex, in a victorious battle against the invading Danes.
Document 4: Anthony, Duke of Brabant: Anthony, Duke of Brabant, also known as Antoine de Brabant, Antoine de Bourgogne and Anthony of Burgundy (August 1384 – 25 October 1415, at the battle of Agincourt), was Duke of Brabant, Lothier and Limburg.
Document 5: Henry V (play): Henry V is a history play by William Shakespeare, believed to have been written around 1599. It tells the story of King Henry V of England, focusing on events immediately before and after the Battle of Agincourt (1415) during the Hundred Years' War. In the First Quarto text, it was entitled "The Cronicle History of Henry the fift", which became "The Life of Henry the Fifth" in the First Folio text.
Document 6: Battle of Flodden: The Battle of Flodden or Flodden Field, or occasionally Battle of Branxton (Brainston Moor), was part of a conflict between the Kingdom of England and the Kingdom of Scotland. The battle was fought in Branxton in the county of Northumberland in northern England on 9 September 1513, between an invading Scots army under King James IV and an English army commanded by Queen Catherine of Aragon. It was a decisive English victory. In terms of troop numbers, it was the largest battle fought between the two kingdoms. James IV was killed in the battle, becoming the last monarch from the island of Britain to suffer such a death.
Document 7: Battle of Agincourt: The Battle of Agincourt ( ; in French, Azincourt ] ) was a battle of the Hundred Years' War that resulted in a English victory. The battle took place on 25 October 1415 (Saint Crispin's Day) in the County of Saint-Pol, Artois, some 40 km south of Calais (now Azincourt in northern France).
Document 8: Sir Nigel: Sir Nigel is a historical novel set during the early phase of the Hundred Years' War, spanning the years 1350 to 1356, by British author Sir Arthur Conan Doyle and written in 1906. It is the background story to Doyle's earlier novel "The White Company", and describes the early life of that book's hero Nigel Loring, a knight in the service of King Edward III in the first phase of the Hundred Years' War.
Document 9: Shy Leopardess: Shy Leopardess is a fantasy novel by Leslie Barringer, the third and last book in his three volume Neustrian Cycle. It is set around the 14th century in an alternate medieval France called Neustria (historically an early division of the Frankish kingdom). The book was first published in the United Kingdom by Methuen in 1948. Its significance was recognized by its republication in the United States by the Newcastle Publishing Company as the thirteenth volume of the celebrated Newcastle Forgotten Fantasy Library series in October, 1977. The Newcastle edition was reprinted by Borgo Press in 1980.
Document 10: Leslie Barringer: Leslie Barringer (1895–1968) was an English editor and author of historical novels and historical fantasy novels, best known for the latter.
Document 11: Know Ye Not Agincourt?: Know Ye Not Agincourt? by Leslie Barringer is a historical novel set in fifteenth century England and France. It concerns the adventures of an English squire and his friends, their taking part in the month-long Siege of Harfleur and the Battle of Agincourt, and its bitter consequences for all of them. It ends with a brief and unknowing meeting with the young Joan of Arc. The book was published by Nelson in 1936 and has not been republished since. Although written for younger readers, it exhibits some of the high literary quality of the Neustrian trilogy.
Document 12: Joris of the Rock: Joris of the Rock is a fantasy novel by Leslie Barringer, the second book in his three volume Neustrian Cycle. It is set around the fourteenth century in an alternate medieval France called Neustria (historically an early division of the Frankish kingdom). The book was first published in the United Kingdom by Heinemann in 1928; an American edition followed from Doubleday in 1929. Its significance was recognized by its republication by the Newcastle Publishing Company as the ninth volume of the celebrated Newcastle Forgotten Fantasy Library series in September, 1976. The Newcastle edition was reprinted by Borgo Press in 1980 and 2010.
Document 13: Battle of Assandun: The Battle of Assandun (or Essendune) was fought between Danish and English armies on 18 October 1016. There is disagreement whether Assandun may be Ashdon near Saffron Walden in north Essex or, as long supposed, Ashingdon near Rochford in southeast Essex, England. It ended in victory for the Danes, led by Canute the Great, who triumphed over the English army led by King Edmund Ironside. The battle was the conclusion to the Danish reconquest of England.
Document 14: Kay the Left-Handed: Kay the Left-Handed is a historical novel by Leslie Barringer set in twelfth century England. It was first published in the United Kingdom by Heinemann in 1935; an American edition from Doubleday followed later the same year.
Document 15: Capetian-Plantagenet rivalry: The conflict between the dynasties of the Capetians and Plantagenets covers a period of 100 years (1159-1259), during which the Kingdom of France fought against the Angevin Empire. This conflict is also called by some historians, the "First Hundred Years War." The conflict is primarily French, since both dynasties were French, the nobles that made up the English army were essentially of French origin, and the foot soldiers of the English king were local recruits in France (Anjou, Guyenne, Normandy, Brittany etc.). At this period, the English king's continental possessions were considered more important than his island possessions, and significantly greater than even those of the French sovereign, even if the latter was the overlord of the former for most of the possessions he held on the continent. And the official language of the two belligerents is the French of that time. French also remained the official language of England until 1361. Such is the origin of the expressions that can still be found today on the shields and coat of arms of the English monarchy "Honi soit qui mal y pense" and "Dieu et mon droit". The English kings, who were of French origin, took wives from France from the 11th to the 15th century. Very rare are those who married a woman of another country, including the cadet branches. Hence the Plantagenet monarchs were ethnically French.
ground_truth: The Battle of Agincourt