 Blankenhain remained within Saxe-Weimar-Eisenach through the era of the German Empire (1871–1918) and into the Weimar Republic until it merged with 7 of the 8 other Saxon duchies to form the Free State of Thuringia ().After being controlled briefly by the United States, from July 1945, the state of Thuringia came under the Soviet occupation zone, and was expanded to include parts of Prussian Saxony, including Erfurt, which became the new capital of Thuringia.In 1952, East Germany dissolved its states, and created districts (") instead, with Blankenhain sitting within the rural district , in .