The middle third of The Three Musketeers takes place against a siege that Dumas treats mostly as colorful backdrop for d'Artagnan's court intrigue and Milady's scheming: a place for the musketeers to eat a famous breakfast under enemy fire and for Richelieu to move between military command and political maneuvering. The actual siege of La Rochelle, which did happen in 1627 and 1628 and did involve Richelieu directing operations in person, was one of the more brutal episodes of seventeenth-century French history, and understanding what actually happened there adds a weight to the novel's backdrop that its swashbuckling foreground rarely pauses to acknowledge.
A Protestant Stronghold in a Catholic Kingdom
La Rochelle had functioned, for decades before the siege, as the effective capital of French Protestantism: a wealthy, well-fortified Atlantic port city that had negotiated real self-governance and religious toleration under the Edict of Nantes, the landmark 1598 settlement that ended France's earlier wars of religion. The city's merchants had grown rich on Atlantic trade, and its fortifications, continuously improved across decades, made it one of the most defensible urban strongholds in the kingdom.
What made La Rochelle intolerable to Richelieu wasn't primarily theological. It was that a fortified, autonomous, foreign-aligned city sitting on France's Atlantic coast represented an unacceptable vulnerability for a kingdom he was actively trying to consolidate under stronger central royal authority. La Rochelle's Huguenot leadership maintained active diplomatic and military ties with Protestant England, and when English forces under the Duke of Buckingham landed nearby in 1627 to support the city, ostensibly in solidarity with fellow Protestants but also serving England's own strategic interest in a weakened, divided France, Richelieu had exactly the pretext he needed to treat the city's continued autonomy as a matter of national security rather than mere religious toleration.
The Wall Across the Sea
The siege's most extraordinary feature, and the one the Motte painting above depicts, was almost absurdly ambitious by the engineering standards of the era: a massive stone and timber dike, over a mile long, constructed directly across La Rochelle's harbor mouth to block English supply ships from reaching the besieged city by sea. Royal engineers built the structure across nearly a year of continuous labor, in a difficult tidal environment, specifically to close the one avenue of relief that might otherwise have let the city hold out indefinitely against Richelieu's land forces.
It worked, and its success is a large part of why the siege ultimately succeeded where a purely land-based blockade might well have failed. English relief fleets arrived on several occasions during the siege and found themselves unable to break through the dike's defenses to resupply the starving city behind it. Richelieu personally oversaw much of the dike's construction and the broader siege operation, spending extended periods in the field rather than directing the campaign from the comparative safety of Paris or the royal court, a detail Dumas preserves reasonably faithfully, since the novel's Richelieu does appear at La Rochelle in person, even if the specific political maneuvering Dumas has him conducting there is fictional.
Starvation, Not Swordplay, Decided the Outcome
What the novel almost entirely omits is the siege's actual human cost, which had far more to do with slow starvation than with any dramatic military confrontation. La Rochelle held out for fourteen months, and by the siege's final weeks the city's population, numbering somewhere around 25,000 at the outset, had been reduced by starvation and disease to a small fraction of that figure. Contemporary accounts describe residents reduced to eating leather, boiled shoe soles, and eventually the city's own dead, conditions that make the novel's occasional light-hearted references to "the siege" feel almost incongruous once you know what the word actually covered on the ground.
Jean Guiton, the city's mayor during the siege's final desperate months, became something of a legendary figure of stubborn resistance, reportedly declaring he would personally kill the first person who spoke of surrender, and keeping a dagger visibly on the negotiating table throughout council meetings as a standing reminder of that threat. His resistance ultimately couldn't overcome simple starvation. The city formally surrendered in October 1628, and by most estimates, somewhere between two-thirds and three-quarters of its pre-siege population had died from the famine and disease the siege had inflicted, a death toll far higher than most military engagements of the era produced through direct combat.
What Richelieu Actually Did With His Victory
What's interesting about the siege's aftermath, and something Dumas's novel doesn't dwell on at all, is how comparatively restrained Richelieu proved once La Rochelle surrendered. He stripped the city of its fortifications and its special political autonomy, ending its function as an independent Protestant stronghold within the kingdom. He did not pursue the kind of systematic religious persecution a more purely sectarian victor might have imposed. The Edict of Nantes's broader religious toleration provisions remained officially in effect for French Protestants generally, even as La Rochelle's own specific political privileges were permanently revoked.
This restraint reflects something important about Richelieu's actual political character that the novel's portrayal, focused mostly on his scheming and his rivalry with the musketeers, doesn't really capture: he was, first and consistently, a state-builder rather than a religious zealot, and his war against La Rochelle was fundamentally a war against a rival center of political and military power within his own kingdom, not a war against Protestant belief as such. He needed French Protestants pacified and subordinate to royal authority. He didn't particularly need them converted, and once La Rochelle's specific military threat was eliminated, his actual policy toward French Protestants generally remained far more pragmatic than the siege's brutal human cost might suggest.
Why the Novel Barely Notices the Suffering
It's worth asking why Dumas, who elsewhere in his fiction shows real interest in the human cost of the historical events his novels dramatize, treats La Rochelle so lightly. Part of the answer is structural: the siege serves the novel primarily as a setting for court intrigue and personal drama among the musketeers, and dwelling on mass starvation would have disrupted the adventure story's momentum in ways Dumas, writing for serialized weekly publication, had every commercial incentive to avoid. Readers picking up each new installment wanted d'Artagnan's next clever maneuver, not an extended meditation on famine.
There's also something worth noting about whose suffering historical adventure fiction of this era generally chose to dramatize and whose it chose to background. The musketeers' own discomforts during the siege, mild deprivation, boredom, the inconvenience of military discipline, get real narrative attention, including the famous bastion breakfast scene where the four heroes eat a leisurely meal under enemy fire specifically to demonstrate their nonchalant courage to watching soldiers. The actual besieged population's far more severe suffering, on the other side of the same siege lines, barely registers as more than a backdrop detail. It's a choice that reflects, in miniature, a broader pattern across historical adventure fiction from this era: the protagonists' perspective organizes the story so completely that entire populations experiencing real catastrophe just outside the frame can pass by as scenery.
None of this diminishes what Dumas accomplished with the siege as a narrative device. The bastion breakfast remains one of the novel's most purely enjoyable set pieces, and the historical backdrop lends real texture to d'Artagnan's political education. But the actual siege of La Rochelle deserves to be understood on its own terms too: not primarily as a stage for fictional swordplay, but as one of seventeenth-century France's darkest chapters, decided in the end not by any dramatic confrontation but by a besieged population's slow, grinding starvation behind a wall Richelieu built directly across the sea.
Read the siege's role in the novel in The Three Musketeers, or see our related piece on Richelieu vs. His Bad PR for more on the man who directed the siege.