La Chapelle-Launay

During the Gallic period the area belonged to the Namnetes, who were conquered by Julius Caesar in 56 BC. In a vase of terra-cotta, about 4 000 currencies of bronze, silver, and a golden currency are found in 1904 and 1906, accompanied with a golden ring and with seven silver spoons.

Of this treasure, which belongs to the monetary deposits buried during the disorders of the years 270-275, the departmental Dobrée museum preserves 350 currencies of bronze and silver, the golden currency in the effigy of the "Gallic" emperor Postumus, the golden ring and the six of seven silver spoons today.

After the fall of the Western Roman Empire in 476, the country rapidly came under the control of Clovis I despite resistance from the Roman garrison of Breton soldiers. During the Frankish period, the country became the 'Breton March'. During the reign of Charlemagne; the territory was initially under the dominion of his nephew, Roland, who was given the title of 'Prefect of the Breton March'.

After Charlemagne's death, Breton expansion intensified. In 850, the region was conquered by Nominoë, the ruler of Brittany, who invaded, among others, the towns of Nantes and Rennes. The following year, in the aftermath of the Battle of Jengland, the Breton March, with Nantes as its capital, was integrated into Brittany by the Treaty of Angers. The subsequent eighty years, however, were made difficult by the constant infighting between the Breton warlords, who promoted Viking invasions. From 919 to 937, the town was managed by the Vikings, who were defeated by Alain Barbe-Torte, the grandson of Alan the Great, the last king of Brittany.[3][4]

In the subsequent period, the Dukes of Brittany fought against the Counts of Nantes. These succession feuds resulted from time to time in Nantes passing under the sovereignty of the house of Anjou. The longest of these periods began in 1156 and lasted 45 years, representing a period of stability. In 1203 Brittany came under the dominion of the Capetians, the French monarchy.

White-Crown Abbey first date known 1161.

The Second Breton War of Succession pitted the supporters of two different claimants against one another: those of the half-brother of the deceased John III, Duke of Brittany, Jean de Montfort, who relied on the Estates of Brittany who gathered in Nantes, and those of Charles I, Duke of Brittany, who was supported by King Philippe VI of France and was recognized as Duke of Brittany by the peers of the kingdom. The De Montfort dynasty emerged victorious from the conflict.

The county was conquered in 1488, from which point Brittany was governed by the kings of France. The heir to the duchy, Anne of Brittany, married Charles VIII of France in 1491, and then Louis XII of France, making her Queen of France. At her death in 1514, she bequeathed her heart to the town of Nantes (currently in the Dobrée museum). Claude of France, the eldest daughter of Anne of Brittany, donated the duchy to her husband Francis I of France, but the Estates of Brittany themselves requested the union of Brittany and France in exchange for the continuation of their privileges, which ushered in the next period.

In 1532 the duchy of Brittany became a part of the French crown lands, as a result of the Union of Brittany and France, an edict declaring a perpetual and indissoluble union between Brittany and France.

The Battle of Savenay on 23 December 1793 was the last, decisive battle of the Revolt in the Vendée during the French Revolution. In this battle the forces of the royalist counter-revolutionaries were irrevocably shattered and many survivor from the battle were killed in the Chapelle-Launay territory.

After D-day and the liberation of most of France in 1944, German troops in Saint-Nazaire's submarine base refused to surrender, and they holed up (as did their counterparts in the La Rochelle and Lorient bases). Since the Germans could no longer conduct major submarine operations from the bases without a supply line, the SHAEF commander, U.S. General Dwight D. Eisenhower decided to simply bypass these ports, and the Allied armies focused their resources on the invasion of Germany. Saint-Nazaire and the other two German "pockets" remained under Nazi control until the last day of the war in Europe, 8 May 1945.