World War II known as the second world War, was a conflict that nearly all parts of the world during the years 1939-45. The main parties to the conflict, and were the Axis powers-Germany, Italy and Japan-and the allies-France, great Britain, and the United States of america, and the Soviet Union, and, to a lesser extent, China. In the second world war was in many respects a continuation, after a serious and a 20-year hiatus, of the disputes left unresolved by the First world War. The 40,000,000-50,000,000 losses in the second world War, the bloodiest conflict, as well as the largest war, in history.
In conjunction with the First world War, the Second world War, it was one of the largest drainage basins in the international political history of the 20th century. This in turn led to the spread of Soviet power in Eastern Europe, the Communist movement and, ultimately, the power is in China, and was a decisive transition of power in the world and all of Western Europe, the United States and the Soviet Union.
At the beginning of 1939, with the German dictator, Adolf Hitler decided to attack and occupation of Poland. Poland, for its part, had guarantees of French and British military assistance in the event of a German attack. Hitler’s plan for the attack on Poland, but first he had to neutralize the possibility that the Soviet Union would resist the invasion of its western neighbour. Secret negotiations led to the signing of the German-soviet non-aggression pact in Moscow, August 23-24th. In a secret protocol of the pact, Germany and the Russians have agreed that Russia will have to be divided between them, with the western part of the country and go to Germany and the eastern two-thirds to the SOVIET union.