Areas annexed by Nazi Germany Date of annexation Annexed area Succeeded by 1935-03-01 Territory of the Saar Basin Gau Palatinate-Saar 1938-03-12 Federal State of Austria Reichsgau Carinthia Reichsgau Lower Danube Reichsgau Salzburg Reichsgau Styria Reichsgau Tirol-Vorarlberg Reichsgau Upper Danube Reichsgau Vienna 1938-10-01 Sudetenland, Bohemia, Czechoslovak Republic Gau Bavarian Eastern March Reichsgau Upper Danube Reichsgau Lower Danube Territory of the Chief of Civil Administration of the Sudetenland Sudetenland, Moravia-Silesia, Czechoslovak Republic Reichsgau Lower Danube Territory of the Chief of Civil Administration of the Sudetenland 1939-03-16 Bohemia, Czechoslovak Republic Gau Bavarian Eastern March Protectorate of Bohemia and Moravia[1] Moravia-Silesia, Czechoslovak Republic Reichsgau Lower Danube Bohemia, Czechoslovak Republic Reichsgau Sudetenland Moravia-Silesia, Czechoslovak Republic Bohemia, Czechoslovak Republic Reichsgau Upper Danube 1939-03-23 Klaipėda Region, Republic of Lithuania Gau East Prussia 1939-09-02 Free City of Danzig Territory of the Chief of Civil Administration of Danzig 1939-10-08 Military Administration in Poland Gau East Prussia Gau Silesia Reichsgau Posen Reichsgau West Prussia 1940-05-18 Eupen-Malmedy, Liège, Wallonia, Military Administration in Belgium and Northern France Gau Cologne-Aachen 1942-07-29 Military Administration of Luxembourg Territory of the Chief of Civil Administration of Luxembourg 1940-08-02 Moselle, French State Territory of the Chief of Civil Administration of Lorraine Bas-Rhin, French State Territory of the Chief of Civil Administration of Alsace Haut-Rhin, French State 1941-04-17 Military Administration in Yugoslavia Territory of the Chief of Civil Administration of Carinthia and Carniola Territory of the Chief of Civil Administration of Lower Styria 1941-07-22 Military Administration in the Soviet Union Territory of the Chief of Civil Administration of Bialystok 1944-12-18 – 1944-12-25 Dunkirk, Nord, Provisional Government of the French Republic Reichsgau Flanders Wallonia, Kingdom of Belgium Reichsgau Wallonia