A coup d'état (English: /ˌkuːdeɪˈtɑː/, French: [ku deta]; plural: coups d'état; translation: strike (against the) state, literally: strike/blow of state)—also known as a coup, putsch, and overthrow—is the sudden, illegal deposition of a government, usually by a small group of the existing state establishment—typically the military—to depose the extant government and replace it with another body, civil or military. A coup d'état is considered successful when the usurpers establish their dominance. When the coup neither fails completely nor succeeds, a civil war is a likely consequence.

A coup d'état typically uses the extant government's power to assume political control of the country. In Coup d'État: A Practical Handbook, military historian Edward Luttwak states that "[a] coup consists of the infiltration of a small, but critical, segment of the state apparatus, which is then used to displace the government from its control of the remainder." The armed forces, whether military or paramilitary, are not a defining factor of a coup d'état.

Adolf Hitler (German: [ˈadɔlf ˈhɪtlɐ] ( listen); 20 April 1889 – 30 April 1945) was an Austrian-born German politician and the leader of the National Socialist German Workers Party (German: Nationalsozialistische Deutsche Arbeiterpartei (NSDAP), commonly referred to as the Nazi Party). He was chancellor of Germany from 1933 to 1945 and dictator of Nazi Germany (as Führer und Reichskanzler) from 1934 to 1945. Hitler is commonly associated with the rise of fascism in Europe, World War II, and the Holocaust.

A decorated veteran of World War I, Hitler joined the German Workers' Party, precursor of the Nazi Party, in 1919, and became leader of the NSDAP in 1921. In 1923, he attempted a coup d'état, known as the Beer Hall Putsch, in Munich. The failed coup resulted in Hitler's imprisonment, during which time he wrote his memoir, Mein Kampf (My Struggle). After his release in 1924, Hitler gained popular support by attacking the Treaty of Versailles and promoting Pan-Germanism, antisemitism, and anticommunism with charismatic oratory and Nazi propaganda. After his appointment as chancellor in 1933, he transformed the Weimar Republic into the Third Reich, a single-party dictatorship based on the totalitarian and autocratic ideology of Nazism. His aim was to establish a New Order of absolute Nazi German hegemony in continental Europe.