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,
France–Germany relations in the population and economy of Germany left France increasingly far behind. In the 1890s relationships remained good as Germany supported France during its difficulties with Britain over African colonies. Any lingering harmony collapsed in 1905, when Germany took an aggressively hostile position to French claims to Morocco. There was talk of war and France strengthened its ties with Britain and Russia. The long-term French reaction to defeat in the Franco-Prussian war of 1870-71 was Revanchism: a deep sense of bitterness, hatred and demand for revenge against Germany, especially because of the loss of Alsace and Lorraine. Paintings that emphasized