The begining of the world war II

World War II, global military conflict that, in terms of lives lost and material destruction, was the most devastating war in human history. It began in 1939 as a European conflict between Germany and an Anglo-French-Polish coalition but eventually widened to include most of the nations of the world. It ended in 1945, leaving a new world order of the Superpowers dominated by the United States and the Union of Soviet Socialist Republics (USSR). More than any previous war, World War II involved the commitment of nations entire human and economic resources, the blurring of the distinction between combatant and non-combatant, and the expansion of the battlefield to include all of the enemys territory. It was also unique in modern times for the savagery of the military attacks unleashed against civilians, and for the adoption by Nazi Germany of genocide (of Jews, Gypsies, homosexuals, and other groups) as a specific war aim. The most important determinants of its outcome were industrial capacity and personnel. In the last stages of the war, two radically new weapons were introduced: the long-range rocket and the atomic bomb. In the main, however, the war was fought with the same or improved weapons of the types used in World War I.

The greatest advances were in aircraft and tanks.

Three major powers had been dissatisfied with the outcome of World War I.

Germany, the principal defeated nation, bitterly resented the territorial losses and reparations payments imposed on it by the Treaty of Versailles. Italy, one of the victors, found its territorial gains far from enough either to offset the cost of the war or to satisfy its ambitions. Japan, also a victor, was unhappy about its failure to gain greater holdings in East Asia.

France, Great Britain, and the United States had attained their wartime objectives. They had reduced Germany to a military cipher and had reorganized Europe and the world as they saw fit, with the French Empire and the British Empire controlling much of the globe. The French and the British frequently disagreed on policy in the post-war period, however, and were unsure of their ability to defend the peace settlement. The United States, disillusioned with the Treaty of Versailles, with the selfish nature of Allied war aims, and with the secret treaties they had signed during the war, disavowed the treaty and the League of Nations included in it, and retreated into political isolationism.

During the 1920s, attempts were made to achieve a stable peace. The first was the establishment (1920) of the League of Nations as a forum in which nations could settle their disputes. The Leagues powers were limited to persuasion and various levels of moral and economic sanctions that the members were free to carry out as they saw fit. At the Washington Conference of 1921-1922, the principal naval powers agreed to limit their navies according to a fixed ratio. The Treaties of Locarno produced by the Locarno Conference (1925) included ...