The Gau Moselland, formed as Gau Koblenz-Trier in June 1931, was an administrative division of Nazi Germany from 1933 to 1945 in the Prussian Rhine Province. Before that, from 1931 to 1933, it was the regional subdivision of the Nazi Party in that area. On 24 January 1941, the Gau was renamed Gau Moselland, Mosel being the German name of the river Moselle. Following the 1940 German conquest of Luxembourg, the country was subsequently annexed on 30 August 1942 and made part of Gau Moselland.