The Treaty of Versailles Region was a region in Europe that was affected by the Treaty of Versailles, which was signed in 1919 after World War I. The region included two provinces, Alsace and Lorraine, which were both annexed by Germany during the war. Alsace is a region in northeastern France, bordering Germany and Switzerland, and Lorraine is a region in northeastern France, bordering Germany, Luxembourg, and Belgium. Both regions were returned to France following the Treaty of Versailles.