Nazi Party, byname of National Socialist German Workers’ Party, German Nationalsozialistische Deutsche Arbeiterpartei (NSDAP), political party of the mass movement known as National Socialism. Under the leadership of Adolf Hitler, the party came to power in Germany in 1933 and governed by totalitarian methods until 1945.

Adolf Hitler Adolf Hitler addressing a rally in Germany, c. 1933. dpa dena/picture-alliance/dpa/AP Images

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It was founded as the German Workers’ Party by Anton Drexler, a Munich locksmith, in 1919. Hitler attended one of its meetings that year, and before long his energy and oratorical skills would enable him to take over the party, which was renamed National Socialist German Workers’ Party in 1920. That year Hitler also formulated a 25-point program that became the permanent basis for the party. The program called for German abandonment of the Treaty of Versailles and for the expansion of German territory. These appeals for national aggrandizement were accompanied by a strident anti-Semitic rhetoric. The party’s socialist orientation was basically a demagogic gambit designed to attract support from the working class. By 1921 Hitler had ousted the party’s other leaders and taken over.

Learn about the rise of Adolf Hitler, the Nazi Party, and the anti-Semitism they fomented in pre-WWII Germany In 1933 Adolf Hitler's National Socialists were voted into power, and the campaign of terror began. From The Second World War: Prelude to Conflict (1963). Encyclopædia Britannica, Inc. See all videos for this article

Under Hitler the Nazi Party grew steadily in its home base of Bavaria. It organized strong-arm groups to protect its rallies and meetings. These groups drew their members from war veterans groups and paramilitary organizations and were organized under the name Sturmabteilung (SA). In 1923 Hitler and his followers felt strong enough to stage the Beer Hall Putsch, an unsuccessful attempt to take control of the Bavarian state government in the hope that it would trigger a nationwide insurrection against the Weimar Republic. The coup failed, the Nazi Party was temporarily banned, and Hitler was sent to prison for most of 1924.

Upon his release Hitler quickly set about rebuilding his moribund party, vowing to achieve power only through legal political means thereafter. The Nazi Party’s membership grew from 25,000 in 1925 to about 180,000 in 1929. Its organizational system of gauleiters (“district leaders”) spread through Germany at this time, and the party began contesting municipal, state, and federal elections with increasing frequency.

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The rise of Nazism in Germany Learn how the Nazi Party used a canny mix of propaganda and terror to ascend to power in Germany. Contunico © ZDF Enterprises GmbH, Mainz See all videos for this article

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However, it was the effects of the Great Depression in Germany that brought the Nazi Party to its first real nationwide importance. The rapid rise in unemployment in 1929–30 provided millions of jobless and dissatisfied voters whom the Nazi Party exploited to its advantage. From 1929 to 1932 the party vastly increased its membership and voting strength; its vote in elections to the Reichstag (the German Parliament) increased from 800,000 votes in 1928 to about 14,000,000 votes in July 1932, and it thus emerged as the largest voting bloc in the Reichstag, with 230 members (38 percent of the total vote). By then big-business circles had begun to finance the Nazi electoral campaigns, and swelling bands of SA toughs increasingly dominated the street fighting with the communists that accompanied such campaigns.

When unemployment began to drop in Germany in late 1932, the Nazi Party’s vote also dropped, to about 12,000,000 (33 percent of the vote) in the November 1932 elections. Nevertheless, Hitler’s shrewd maneuvering behind the scenes prompted the president of the German republic, Paul von Hindenburg, to name him chancellor on January 30, 1933. Hitler used the powers of his office to solidify the Nazis’ position in the government during the following months. The elections of March 5, 1933—precipitated by the burning of the Reichstag building only days earlier—gave the Nazi Party 44 percent of the votes, and further unscrupulous tactics on Hitler’s part turned the voting balance in the Reichstag in the Nazis’ favour. On March 23, 1933, the Reichstag passed the Enabling Act, which “enabled” Hitler’s government to issue decrees independently of the Reichstag and the presidency; Hitler in effect assumed dictatorial powers.

Nazi Party rally Nazi Party rally at Nürnberg, Germany, in 1933. © Everett Historical/Shutterstock.com

Reichstag fire The Reichstag burning in Berlin on February 27, 1933. National Archives, Washington, D.C.

On July 14, 1933, his government declared the Nazi Party to be the only political party in Germany. On the death of Hindenburg in 1934 Hitler took the titles of Führer (“Leader”), chancellor, and commander in chief of the army, and he remained leader of the Nazi Party as well. Nazi Party membership became mandatory for all higher civil servants and bureaucrats, and the gauleiters became powerful figures in the state governments. Hitler crushed the Nazi Party’s left, or socialist-oriented, wing in 1934, executing Ernst Röhm and other rebellious SA leaders on what would become known as the “Night of the Long Knives.” Thereafter, Hitler’s word was the supreme and undisputed command in the party. The party came to control virtually all political, social, and cultural activities in Germany. Its vast and complex hierarchy was structured like a pyramid, with party-controlled mass organizations for youth, women, workers, and other groups at the bottom, party members and officials in the middle, and Hitler and his closest associates at the top wielding undisputed authority.

Ernst Röhm Ernst Röhm, 1933. Heinrich Hoffmann, Munich

Upon Germany’s defeat, Hitler’s suicide, and the Allied occupation of the country in 1945 at the end of World War II, the Nazi Party was banned, and its top leaders were convicted of crimes against peace and against humanity.

There have been minor Nazi parties in other countries (such as the United States), but after 1945 Nazism as a mass movement was virtually nonexistent.