It was such a catastrophic conflict that was underway by 1939 and ended in 1945. It involved most of the world's nations including all of the great powers eventually forming twoopposing military alliances: the Allies and the Axis. It was the most widespread war in history, with more than 100 million military personnel mobilised. In a state of "total war” the major participantsplaced their entire economic, industrial, and scientific capabilities at the service of the war effort, erasing the distinction between civilian and military resources. There were such significant eventsinvolving the mass death of civilians, including the Holocaust and the only use of nuclear weapons in warfare, it is the deadliest conflict in human history, resulting in 50 million to over 70 millionfatalities.
Although Japan was already at war with China in 1937, the world war is generally said to have begun on 1 September 1939, with the invasion of Poland by Germany, andsubsequent declarations of war on Germany by France and most of the countries of the British Empire and Common wealth.
The war ended with such a successful victory of the Allies over the Axis in 1945. World War II alteredthe political alignment and social structure of the world. The United Nations(UN) organization was established to foster international cooperation and prevent future conflicts. The Soviet Union andthe United States emerged as rival superpowers, setting the stage for the COLD WAR, which lasted for the next 46 years.
Most countries whose industries had been damaged moved towards economicrecovery. Political integration, especially in Europe, emerged as an effort to stabilise postwar relations.
OPPOSING MILITARY ALLIANCES
THE ALIES POWERS.-Were the countries that opposed the Axispowers during the Second World War(1939–1945). Former Axis states contributing to the Allied victory are not considered Allied states. The Allies became involved in World War II either because they had...