The Start of the War
In October 1929, the stock market collapsed in the United States leading to an economic crisis that swept the entire capitalist world. The turmoil brought about by the Great Depression in Western countries helped sustain and propel the rise of fascism in Europe and Asia. In January 1933, Adolf Hitler came to power in Germany. Hitler completely reorganized the country's life, established a fascist system with centralized power, and stepped up the expansion of the military. By this point Japan had also embarked on the road to war and fascism, invading Manchuria in 1931 and China in 1937. In 1935, the fascist dictator of Italy, Benito Mussolini, who rose to power in the early 1920s, launched an invasion of Abyssinia. Although the League of Nations established in 1920 was an international organization designed to prevent armed conflicts, it was weakened by the absence of the United States and was unable to prevent the expansion of fascist forces during these years. Hitler would take over in Austria in March 1938, the German-speaking part of Czechoslovakia in September, and the rest of Czechoslovakia in March 1939. After concluding a non-aggression pact with Soviet Union that included a secret agreement to allow Stalin to absorb eastern Poland and the Baltic States, Hitler attacked Poland on September 1, 1939. The United Kingdom sent an ultimatum to Germany to cease military operations. However, the diplomatic efforts failed. On September 3, Britain and France declared war on Germany. The Second World War was on.