information:classification, stylistic:style_transfer, structural:expansion, linguistic:voice_change
The French colonial empire (French: Empire colonial français) comprised the overseas colonies, protectorates, and mandate territories that came under French rule from the 16th century onward. A distinction is generally made between the " First French colonial empire ", that existed until 1814, by which time most of it had been lost or sold, and the " Second French colonial empire ", which began with the conquest of Algiers in 1830. On the eve of World War I, France's colonial empire was the second largest in the world after the British Empire.

France began to establish colonies in the Americas, the Caribbean, and India in the 16th century but lost most of its possessions following its defeat in the Seven Years' War. The North American possessions were lost to Britain and Spain, but Spain later returned Louisiana to France in 1800. The territory was then sold to the United States in 1803. France rebuilt a new empire mostly after 1850, concentrating chiefly in Africa as well as Indochina and the South Pacific. As it developed, the new French empire took on roles of trade with the metropole, supplying raw materials and purchasing manufactured items. Especially after the disastrous Franco-Prussian War, which saw Germany become the leading economic and military power of Continental Europe, acquiring colonies and rebuilding an empire was seen as a way to restore French prestige in the world. It was also to provide manpower during the world wars.

A major goal was the Mission civilisatrice or " Civilizing Mission ". In 1884, the leading proponent of colonialism, Jules Ferry, declared: "The higher races have a right over the lower races, they have a duty to civilize the inferior races." Full citizenship rights – assimilation – were offered, although in reality "assimilation was always receding the colonial populations treated like subjects not citizens." France sent small numbers of settlers to its empire, with the notable exception of Algeria, where the French settlers took power while being a minority.

In World War II, Charles de Gaulle and the Free French took control of the overseas colonies one-by-one and used them as bases from which they prepared to liberate France. Historian Tony Chafer argues: "In an effort to restore its world-power status after the humiliation of defeat and occupation, France was eager to maintain its overseas empire at the end of the Second World War." However, after 1945 anti-colonial movements began to challenge European authority. Major revolts in Indochina and Algeria proved very expensive and France lost both colonies. After these conflicts, a relatively peaceful decolonization took place elsewhere after 1960. The French Constitution of 27 October 1946 (Fourth French Republic) established the French Union, which endured until 1958. Newer remnants of the colonial empire were integrated into France as overseas departments and territories within the French Republic. These now total altogether 119,394 km (46,098 sq. miles), with 2.8 million people in 2021. Links between France and its former colonies persist through La francophonie, the CFA franc, and joint military operations such as Operation Serval.