The Battle of France (1940) is the rupture that makes the war impossible to dismiss as rumor: the familiar routines of Paris give way to hurried evacuation, and Marie-Laure LeBlanc is separated from her father. The novel renders the campaign less as a military overview than as pressure felt in museum corridors, on the road out of the city, and in the uncertain lives shaped by occupation afterward.

From rumor to imminent danger

Before the crisis reaches the museum, Marie-Laure repeats alarming stories to her father, who responds to talk of Germany as if the country’s name were still a question. He reassures her that the takeover of Austria is nothing to worry about and that no one would be foolish enough to repeat the last war. Around them, the working day seems unchanged: museum staff collect keys, study specimens and manuscripts, and pass through familiar halls; the director arrives in his Delage limousine, and vendors wheel sandwich carts through the building. Marie-Laure reads Twenty Thousand Leagues Under the Sea wherever she can, returning to its first half until she nearly knows it by heart.

The contrast between routine and danger grows sharper as rumors become nightmares. Office workers circulate stories of Germans entering apartments and booby-trapping household objects; Marie-Laure dreams of silent boats on the Seine, chained beasts, and an assault on the museum. Yet spring still appears beautiful. Bees move among the blooming aisles of the Jardin des Plantes, and fluff from the plane trees gathers on the paths. That calm is increasingly strained: the museum protects its collections, couriers move objects to country estates, and Daniel LeBlanc works late to secure crates and transport records. Fossils, manuscripts, jade, stones, pearls, and gold are packed away. Marie-Laure wonders whether the Sea of Flames might be among the treasures.

Paris prepares, then empties

The threat becomes tangible in the museum’s changing defenses. Deliveries stop; sandbags appear at the gates; soldiers watch the gardens from the roof of the Gallery of Paleontology. They scan the sky, but Marie-Laure sees no aircraft in the immense bowl overhead—only returning songbirds and the changing spring wind. The tension lies in the gap between what people fear and what they can see. On Marie-Laure’s twelfth birthday, her father is too busy to prepare their usual puzzle, but he gives her the second Braille volume of Twenty Thousand Leagues Under the Sea, an unusually thick book. A moment of anticipation survives even as the city approaches crisis.

In Paris, people pack china into cellars, sew pearls into hems, and hide gold rings in book bindings. The museum’s workspaces are stripped of typewriters, and its halls become packing yards strewn with straw, sawdust, and twine. Marie-Laure tries to read while Captain Nemo is about to take his companions through oyster beds, but the words break apart on the page; her attention cannot stay with the novel. When her father pulls her out and locks the key pound, panic seems to travel through the rows of trees. Soon he buttons her into a winter overcoat despite the middle-of-June weather. She carries her cane and holds on to his rucksack as they walk streets beyond the limits of the model he made for her, eventually reaching a crowd and a train for which the director has arranged tickets.

Flight and Daniel LeBlanc’s arrest

The departure does not carry the family safely through the crisis. Daniel is seized outside Vitré, hours from Paris, when plainclothes policemen bundle him off a train as other passengers look on. French interrogators question him first, then German ones. They display his notebook, tool case, and ring of seven skeleton keys, asking what the keys open and why his notebook contains architectural measurements. Daniel explains that he is making a model for his daughter and that the keys belong to the museum where he works. The authorities nevertheless take him to a cell. Its antiquated lock and hinges prompt him to imagine that the museum’s director or colleagues will soon explain the misunderstanding, but no one arrives to do so.

A second interrogation offers no clarification. The Germans appear to suspect that Daniel planned to destroy the Château de Saint-Malo, though the reason for the accusation remains unclear. They deny him paper, linens, and a telephone, and they already have photographs of him. Two days after his arrest, they drive him to a holding pen outside Strasbourg, where roughly thirty other prisoners sleep on straw over frozen mud. Daniel imagines kissing Marie-Laure on each eye while she sleeps. His arrest turns their hurried departure into a prolonged separation: on the twentieth morning without news, Marie-Laure stays in bed, stops asking Madame Manec to take her to the station or petition the authorities, and hardly eats. The museum eventually tells Etienne LeBlanc that Daniel never arrived.

Occupation’s long aftermath

The novel carries the consequences beyond the flight from Paris. In occupied Saint-Malo, administrative orders make control of everyday life explicit: residents must surrender radio receivers or risk arrest as saboteurs. Later, men between sixteen and sixty are ordered to assemble at the château before being marched to Fort National at low tide. These measures belong to the continuing occupation, not simply to the moment of departure, but they show how the military crisis becomes a lasting system of restrictions and coercion.

That system does not eliminate local action. Madame Ruelle and Madame Guiboux strap a stepladder to a car and rearrange road signs at dusk, returning to Number 4 rue Vauborel laughing; one altered sign places Dinan far to the north, even in the sea. Their small intervention contrasts with the official orders that govern movement and communication. Across the story, work, letters, radios, and family routines all register the war’s reach: a letter from Frau Elena describes the threat of punishment for listening to foreign broadcasts, while Jutta’s later letters are interrupted by censor marks and reports of shortages. The Battle of France thus matters not only as the beginning of flight, but as the decisive break after which ordinary objects and habits—keys, books, routes, and messages—carry new risks, while the people separated by war struggle to preserve any connection at all.