The Imperial Territory of Alsace-Lorraine (German: Reichsland Elsaß-Lothringen or Elsass-Lothringen) was a territory created by the German Empire in 1871 after it annexed most of Alsace and the Moselle department of Lorraine following its victory in the Franco-Prussian War. The Alsatian part lay in the Rhine Valley on the west bank of the Rhine River and east of the Vosges Mountains.