The German-speaking Community, also known as East Belgium, is one of the three federal communities of Belgium, with an area of 854 km2 (330 sq mi) in the Liège Province of Wallonia, including nine of the eleven municipalities of Eupen-Malmedy. The primary language of the community is German, making this the third official language in Belgium. Traditionally the community and the wider area around it forms an intersection of various local languages and/or dialects, namely Limburgish, Ripuarian and Moselle Franconian varieties. The community population numbers around 77,949 – about 7.0% of Liège Province and about 0.7% of the national total.

The Rhine Province, also known as Rhenish Prussia or synonymous with the Rhineland, was the westernmost province of the Kingdom of Prussia and the Free State of Prussia, within the German Reich, from 1822 to 1946. It was created from the provinces of the Lower Rhine and Jülich-Cleves-Berg. Its capital was Koblenz and in 1939 it had 8 million inhabitants. The Province of Hohenzollern was militarily associated with the Oberpräsident of the Rhine Province. Also, for a short period of time, the Province of Hohenzollern was indirectly and de facto controlled by the Rhine Province.