Foreign relations of Belgium sanctioned the creation of Belgium in 1831 on the condition that the country remain strictly neutral. This policy of neutrality ended after the experience of German occupation during World War I. In the years preceding World War II, Belgium tried to return to a policy of neutrality, but once again, Germany invaded the country. In 1948, Belgium signed the Treaty of Brussels with the United Kingdom, France, the Netherlands, and Luxembourg, and one year later became one of the founding members of the Atlantic Alliance. The Belgians have been strong advocates of European integration, and most aspects of their foreign,
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