Numerous internment camps and concentration camps were located in France before, during and after World War II. Beside the camps created during World War I to intern German, Austrian and Ottoman civilian prisoners, the Third Republic (1871–1940) opened various internment camps for the Spanish refugees fleeing the Spanish Civil War (1936–1939). Following the prohibition of the French Communist Party (PCF) by the government of Édouard Daladier, they were used to detain communist political prisoners. The Third Republic also interned German anti-Nazis.

The Algerian War was a major armed conflict between France and the Algerian National Liberation Front (FLN) from 1954 to 1962, which led to Algeria winning its independence from France. An important decolonization war, it was a complex conflict characterized by guerrilla warfare and war crimes. The conflict also became a civil war between the different communities and within the communities. The war took place mainly on the territory of Algeria, with repercussions in metropolitan France.