REVIEW: The Greatest Knight, by Thomas Asbridge
TL;DR
William Marshal’s near-execution at age 5 sets the tone for the whole legend — In 1152 King Stephen took him hostage after John Marshal betrayed a truce, reportedly spared him when the boy treated the gallows and catapult like playthings, and the story survives through a rare 19,215-line medieval French biography.
The book’s real trick is using one man’s life to explain an entire medieval system — Jane Smith praises Thomas Asbridge for making William Marshal a lens on succession crises, feudal patronage, child hostages, crusading culture, and the economics of knighthood instead of just telling a hero story.
Knighthood here is less fairy-tale honor and more brutally expensive professional networking — A destrier in the 1160s could cost the equivalent of 40 riding horses, 200 pack horses, 500 oxen, or about 4,500 sheep, so younger sons like William needed a patron and a place in a lord’s mesnie to exist as knights at all.
The tournaments that made Marshal famous looked nothing like movie jousts — Asbridge describes 12th-century tournaments as chaotic war games spread over miles of countryside, where hundreds or thousands of mounted knights chased captures for ransom and effectively invented chivalry as a code among horse-borne elites.
Marshal’s rise comes from repeated acts of loyalty under pressure, not just battlefield skill — He goes from broke, horseless vagabond to serving Eleanor of Aquitaine, tutoring the Young King Henry, sparing Richard the Lionheart by killing only his horse, and eventually becoming regent for Henry III at nearly 70.
Smith’s biggest takeaway is that William Marshal didn’t just embody chivalry — he helped create it — His anecdotes, values, and posthumous biography fed directly into the literary and cultural machinery that turned “a guy on a horse” into the enduring ideal of the knight.
The Breakdown
A five-year-old hostage, a king, and the Anarchy
Jane Smith opens hard: in 1152 King Stephen nearly had a little boy killed by hand during the English civil war known as the Anarchy. That boy was William Marshal, handed over as a hostage after his father John Marshal betrayed a truce; the unforgettable detail is that William supposedly thought the catapult meant to launch him at the walls was a swing. Smith uses the story to quickly sketch the feral politics of Stephen, Empress Matilda, and the broken royal succession that made this kind of thing possible.
Why Asbridge’s book works better than just reading the medieval source
The main source is a 19,215-line rhyming French poem, probably assembled from stories told by people who actually knew Marshal — maybe even by Marshal himself. Smith notes that this is basically the only surviving medieval biography of a “normal person,” not a king or saint, and that it exists in just one manuscript. Her case for Asbridge is simple: he doesn’t just narrate William’s life, he uses it to explain the wider medieval world for educated non-specialists.
John Marshal was not normal, and medieval parents did love their kids
Smith lingers on Asbridge’s rebuttal to the lazy idea that medieval parents were numb because child mortality was high. He brings in a grisly Gerald of Wales anecdote about a father castrating himself in a failed attempt to save his son, and Smith fully acknowledges how bonkers the story is while making the point: contemporaries expected parental love. That makes John Marshal’s reported “I can forge finer sons” response feel monstrous even by 12th-century standards.
Training to be a knight meant money, patrons, and a posse
Once the war ends, William goes to Normandy to train in the household of William of Tancarville, where he learns the martial basics and acquires the nickname “greedy guts.” Smith emphasizes the practical reality medieval fantasy usually skips: horses, armor, and weapons were ruinously expensive, and a younger son could not self-finance knighthood. What he needed was a mesnie — less bureaucratic household, more rapper’s posse or warlord’s commitatus.
Tournaments were giant war games, and chivalry grew out of them
This is one of Smith’s favorite sections. She stresses that 12th-century tournaments were not tidy jousts for ladies’ favors but sprawling team melees across miles of countryside, with knights capturing one another for ransom. Asbridge’s argument is that chivalry emerged here as the rules of the game: keep your word, don’t cheat capture, fight the properly equipped opponent — a culture built by mounted professionals performing for one another.
Marshal becomes a star, then nearly dies for Eleanor of Aquitaine
At about 20, William starts winning tournaments by using his signature move — seizing an opponent’s bridle and dragging horse and rider out of play. He climbs fast, then in 1168 survives an ambush while escorting Queen Eleanor, holding the line until she escapes and taking a lance through the thigh “backed up against a hedge like a boar before a pack of wolves.” That ransom by Eleanor herself is the turning point from broke knight to someone who has finally arrived.
The Young King Henry years: glory, camaraderie, and the best story in the book
William becomes tutor in arms and close companion to Henry the Young King, and Smith clearly loves Asbridge’s portrait of this glittering little court of tournament stars. The standout anecdote is Marshal dragging Simon of Neauphle away by the bridle, only for Simon to escape by grabbing an overhanging gutter while William keeps riding, oblivious, until the Young King asks: “What knight?” It’s funny, intimate, and exactly the kind of story that makes the whole legend feel lived-in.
Five kings later, the old knight helps save England
The back half compresses decades of service: William joins Henry II, confronts Richard the Lionheart, gets richly rewarded, supports Richard’s regime, then stays loyal even through King John’s disasters, Magna Carta, and the French invasion. The last great image is William at nearly 70, acting as regent for the nine-year-old Henry III and almost forgetting his helmet before leading the cavalry charge at Lincoln in 1217. Smith closes on Asbridge’s bigger point: Marshal didn’t just live the code of chivalry — his life story helped write it.