The Algerian War, also known as the Algerian War of Independence or the Algerian Revolution was a war between France and the Algerian National Liberation Front from 1954 to 1962, which led to Algeria gaining its independence from France. An important decolonization war, it was a complex conflict characterized by guerrilla warfare, maquis fighting, and the use of torture by both sides. 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.

Effectively started by members of the National Liberation Front (FLN) on November 1, 1954, during the Toussaint Rouge ("Red All Saints' Day"), the conflict led to serious political crises in France, causing the fall of the Fourth French Republic (1946–58) replaced by the Fifth Republic with a strengthened Presidency. The brutality of the methods employed by the French forces failed to win hearts and minds in Algeria, alienated support in metropolitan France and discredited French prestige abroad.

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