The Wehrmacht (German pronunciation: [ˈveːɐ̯maxt] ( listen) (Defence Force) – from German: wehren, to defend and Macht, power, force, cognate to English might) was the unified armed forces of Germany from 1935 to 1945. It consisted of the Heer (army), the Kriegsmarine (navy) and the Luftwaffe (air force).

Before the National Socialist German Workers' (Nazi) Party assumed control of the German government in 1933, the term Wehrmacht generically described a nation’s “home defence” forces, analogous to the German Streitmacht foreign war forces, thus, Britische Wehrmacht denoted “British defence forces.” The term Wehrmacht is in Article 47 of the 1919 Weimar Constitution, establishing that: Der Reichspräsident hat den Oberbefehl über die gesamte Wehrmacht des Reiches (“The National President holds supreme command of all armed forces of the nation”). From 1919, Germany’s national defence force was known as the Reichswehr, until its renaming as the Wehrmacht on 16 March 1935.

After World War II (1939–45), the Allies abolished the Wehrmacht. In 1955, when the western Federal Republic of Germany (FRG) remilitarized, its armed forces were named the Bundeswehr ("Federal Defence"). In 1956, upon formal establishment, the armed forces of the Communist, east German Democratic Republic (known for short in English as the GDR, or for short in German as the DDR) were named the Nationale Volksarmee (National People's Army), some of whom, with matériel, were incorporated to the Bundeswehr when the German reunification consolidated the two Germanies in 1990.