France–Germany relations of the further integration of the EU. They are sometimes described as the "twin engine" or "core countries" pushing for moves. A tram straddling the Franco-German border, across the river Rhine from Strasbourg to Kehl, was inaugurated on the 28th of April 2017 symbolising the strength of relation between the two countries. Both France and Germany track their history back to the time of Charlemagne, whose vast empire included most of the area of both modern-day France and Germany – as well as the Netherlands, Belgium, Luxembourg, Switzerland, Austria, Slovenia, and northern Italy. The death of Charlemagne's son Louis the
Reichskommissariat of Belgium and Northern France landings, so the existence of the territory was short. Following the liberation, the territory was retrospectively annexed directly into Germany (although no longer under "de facto" German control) as three separate "Reichsgaue": "Reichsgau Flandern", "Wallonien" and the Brussels district Reichskommissariat of Belgium and Northern France The "Reichskommissariat" of Belgium and Northern France was a German civil administration ("Zivilverwaltung") which governed German-occupied Belgium during World War II. The "Reichskommissariat" replaced an earlier military government, the Military Administration in Belgium and Northern France, established in the same territory in 1940. On 18 July 1944, the first Gauleiter, Josef Grohé, was named the