Saarland: Polity Style: 1920-2023 26 Feb 1920 - 1 Mar 1935 Saargebiet = Territoire de la Sarre [1] 1 Mar 1935 incorporated into Germany 31 Jul 1945 territory organized as administrative unit by resolution of the military authorities of France 31 Jul 1945 - 17 Dec 1947 Saargebiet = Territoire de la Sarre [2] 17 Dec 1947 Constitution of Saarland is approved by Constituent Assembly 15 Dec 1947 and comes into operation upon publication in official gazette 17 Dec 1947 17 Dec 1947 - Saarland [3] 1 Jan 1957 incorporated into Germany as a Bundesland in accordance with the treaty between France and Germany signed 27 Oct 1956 [1] Also in official use: Saarbecken = Bassin de la Sarre and Saarbeckengebiet = Territoire du Bassin de la Sarre [2] Also in official use: Sarre (French); Saarland (German, gradually enters into official use after 8 Oct 1946) [3] Semi-official (French) before incorporation into Germany: Sarre Last updated on: 01 Sep 2011 20:00:00