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,
Jesuits and Nazi Germany their lives to save Jews during the Holocaust of World War II. These are: Roger Braun (1910–1981) of France; Pierre Chaillet (1900–1972) of France; Jean-Baptist De Coster (1896–1968) of Belgium; Jean Fleury (1905–1982) of France; Emile Gessler (1891–1958) of Belgium; Jean-Baptiste Janssens (1889–1964) of Belgium; Alphonse Lambrette (1884–1970) of Belgium; Planckaert Emile (1906–2006) of France; (1894–1949) of Hungary; Henri Revol (1904–1992) of France; (1907–1942) of Poland; Henri Van Oostayen (1906–1945) of Belgium; Ioannes Marangas (1901-1989) of Greece; and Raffaele de Chantuz Cube (1904-1983) of Italy. For more information on these Jesuits and others who were involved in helping Jews, see