Germany War II in Europe. In response to Hitler's actions, two days later, on 3 September, after a British ultimatum to Germany to cease military operations was ignored, Britain and France declared war on Germany. In the spring of 1940, Germany conquered Denmark and Norway, the Netherlands, Belgium, Luxembourg, and France forcing the French government to sign an armistice after German troops occupied most of the country. The British repelled German air attacks in the Battle of Britain in the same year. In 1941, German troops invaded Yugoslavia, Greece and the Soviet Union. By 1942, Germany and other Axis powers controlled
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